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Finding the Fourth Proportional to 138,590.79, 191,255.76 and 74,929.04

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Solution

The fourth proportional to 138,590.79, 191,255.76 and 74,929.04 is: 103,402.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,590.79 : 191,255.76 = 74,929.04 : x
  2. Step 2: Convert to fraction form
    138,590.79/191,255.76 = 74,929.04/x
  3. Step 3: Cross multiply
    138,590.79x = 191,255.76 × 74,929.04
  4. Step 4: Simplify right side
    138,590.79x = 14,330,610,116.63
  5. Step 5: Solve for x
    x = 14,330,610,116.63/138,590.79
  6. Step 6: Final answer
    x = 103,402.33

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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.