Home / 257,920,060.40-386,880,090.60-85,423,497.20

Finding the Fourth Proportional to 257,920,060.40, 386,880,090.60 and 85,423,497.20

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Solution

The fourth proportional to 257,920,060.40, 386,880,090.60 and 85,423,497.20 is: 128,135,245.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,920,060.40 : 386,880,090.60 = 85,423,497.20 : x
  2. Step 2: Convert to fraction form
    257,920,060.40/386,880,090.60 = 85,423,497.20/x
  3. Step 3: Cross multiply
    257,920,060.40x = 386,880,090.60 × 85,423,497.20
  4. Step 4: Simplify right side
    257,920,060.40x = 33,048,650,336,104,848
  5. Step 5: Solve for x
    x = 33,048,650,336,104,848/257,920,060.40
  6. Step 6: Final answer
    x = 128,135,245.80

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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.