Home / 85,887,331.20-128,830,996.80-51,875,107.20

Finding the Fourth Proportional to 85,887,331.20, 128,830,996.80 and 51,875,107.20

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Solution

The fourth proportional to 85,887,331.20, 128,830,996.80 and 51,875,107.20 is: 77,812,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,887,331.20 : 128,830,996.80 = 51,875,107.20 : x
  2. Step 2: Convert to fraction form
    85,887,331.20/128,830,996.80 = 51,875,107.20/x
  3. Step 3: Cross multiply
    85,887,331.20x = 128,830,996.80 × 51,875,107.20
  4. Step 4: Simplify right side
    85,887,331.20x = 6,683,121,769,682,857
  5. Step 5: Solve for x
    x = 6,683,121,769,682,857/85,887,331.20
  6. Step 6: Final answer
    x = 77,812,660.80

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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.