Home / 38,689,156.78-53,391,034.11-21,285,128.23

Finding the Fourth Proportional to 38,689,156.78, 53,391,034.11 and 21,285,128.23

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Solution

The fourth proportional to 38,689,156.78, 53,391,034.11 and 21,285,128.23 is: 29,373,475.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,689,156.78 : 53,391,034.11 = 21,285,128.23 : x
  2. Step 2: Convert to fraction form
    38,689,156.78/53,391,034.11 = 21,285,128.23/x
  3. Step 3: Cross multiply
    38,689,156.78x = 53,391,034.11 × 21,285,128.23
  4. Step 4: Simplify right side
    38,689,156.78x = 1,136,435,007,363,654
  5. Step 5: Solve for x
    x = 1,136,435,007,363,654/38,689,156.78
  6. Step 6: Final answer
    x = 29,373,475.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.