Home / 85,810,264.80-128,715,397.20-78,755,877.60

Finding the Fourth Proportional to 85,810,264.80, 128,715,397.20 and 78,755,877.60

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Solution

The fourth proportional to 85,810,264.80, 128,715,397.20 and 78,755,877.60 is: 118,133,816.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810,264.80 : 128,715,397.20 = 78,755,877.60 : x
  2. Step 2: Convert to fraction form
    85,810,264.80/128,715,397.20 = 78,755,877.60/x
  3. Step 3: Cross multiply
    85,810,264.80x = 128,715,397.20 × 78,755,877.60
  4. Step 4: Simplify right side
    85,810,264.80x = 10,137,094,067,118,582
  5. Step 5: Solve for x
    x = 10,137,094,067,118,582/85,810,264.80
  6. Step 6: Final answer
    x = 118,133,816.40

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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.