Home / 85,934,897.38-128,901,083.05-21,238,708.02

Finding the Fourth Proportional to 85,934,897.38, 128,901,083.05 and 21,238,708.02

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Solution

The fourth proportional to 85,934,897.38, 128,901,083.05 and 21,238,708.02 is: 31,857,749.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,934,897.38 : 128,901,083.05 = 21,238,708.02 : x
  2. Step 2: Convert to fraction form
    85,934,897.38/128,901,083.05 = 21,238,708.02/x
  3. Step 3: Cross multiply
    85,934,897.38x = 128,901,083.05 × 21,238,708.02
  4. Step 4: Simplify right side
    85,934,897.38x = 2,737,692,466,360,721
  5. Step 5: Solve for x
    x = 2,737,692,466,360,721/85,934,897.38
  6. Step 6: Final answer
    x = 31,857,749.88

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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.