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Finding the Fourth Proportional to 131,169, 181,013.40 and 71,553

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Solution

The fourth proportional to 131,169, 181,013.40 and 71,553 is: 98,743.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,169 : 181,013.40 = 71,553 : x
  2. Step 2: Convert to fraction form
    131,169/181,013.40 = 71,553/x
  3. Step 3: Cross multiply
    131,169x = 181,013.40 × 71,553
  4. Step 4: Simplify right side
    131,169x = 12,952,051,810.20
  5. Step 5: Solve for x
    x = 12,952,051,810.20/131,169
  6. Step 6: Final answer
    x = 98,743.24

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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.