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Finding the Fourth Proportional to 172,387, 237,923.28 and 99,779.38

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Solution

The fourth proportional to 172,387, 237,923.28 and 99,779.38 is: 137,712.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,387 : 237,923.28 = 99,779.38 : x
  2. Step 2: Convert to fraction form
    172,387/237,923.28 = 99,779.38/x
  3. Step 3: Cross multiply
    172,387x = 237,923.28 × 99,779.38
  4. Step 4: Simplify right side
    172,387x = 23,739,837,365.97
  5. Step 5: Solve for x
    x = 23,739,837,365.97/172,387
  6. Step 6: Final answer
    x = 137,712.46

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1.5x scale

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.