Home / 85,904,520.12-128,857,046.31-21,208,332.60

Finding the Fourth Proportional to 85,904,520.12, 128,857,046.31 and 21,208,332.60

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Solution

The fourth proportional to 85,904,520.12, 128,857,046.31 and 21,208,332.60 is: 31,812,564.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,904,520.12 : 128,857,046.31 = 21,208,332.60 : x
  2. Step 2: Convert to fraction form
    85,904,520.12/128,857,046.31 = 21,208,332.60/x
  3. Step 3: Cross multiply
    85,904,520.12x = 128,857,046.31 × 21,208,332.60
  4. Step 4: Simplify right side
    85,904,520.12x = 2,732,843,095,996,083
  5. Step 5: Solve for x
    x = 2,732,843,095,996,083/85,904,520.12
  6. Step 6: Final answer
    x = 31,812,564.60

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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.