Home / 87,124,553.40-130,686,830.10-85,780,860.60

Finding the Fourth Proportional to 87,124,553.40, 130,686,830.10 and 85,780,860.60

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Solution

The fourth proportional to 87,124,553.40, 130,686,830.10 and 85,780,860.60 is: 128,671,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,124,553.40 : 130,686,830.10 = 85,780,860.60 : x
  2. Step 2: Convert to fraction form
    87,124,553.40/130,686,830.10 = 85,780,860.60/x
  3. Step 3: Cross multiply
    87,124,553.40x = 130,686,830.10 × 85,780,860.60
  4. Step 4: Simplify right side
    87,124,553.40x = 11,210,428,755,063,982
  5. Step 5: Solve for x
    x = 11,210,428,755,063,982/87,124,553.40
  6. Step 6: Final answer
    x = 128,671,290.90

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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.