Home / 257,920,061.40-386,880,092.10-85,423,498.20

Finding the Fourth Proportional to 257,920,061.40, 386,880,092.10 and 85,423,498.20

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Solution

The fourth proportional to 257,920,061.40, 386,880,092.10 and 85,423,498.20 is: 128,135,247.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,920,061.40 : 386,880,092.10 = 85,423,498.20 : x
  2. Step 2: Convert to fraction form
    257,920,061.40/386,880,092.10 = 85,423,498.20/x
  3. Step 3: Cross multiply
    257,920,061.40x = 386,880,092.10 × 85,423,498.20
  4. Step 4: Simplify right side
    257,920,061.40x = 33,048,650,851,120,188
  5. Step 5: Solve for x
    x = 33,048,650,851,120,188/257,920,061.40
  6. Step 6: Final answer
    x = 128,135,247.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.