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Finding the Fourth Proportional to 138,664.60, 191,356.64 and 75,002.40

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Solution

The fourth proportional to 138,664.60, 191,356.64 and 75,002.40 is: 103,503.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,664.60 : 191,356.64 = 75,002.40 : x
  2. Step 2: Convert to fraction form
    138,664.60/191,356.64 = 75,002.40/x
  3. Step 3: Cross multiply
    138,664.60x = 191,356.64 × 75,002.40
  4. Step 4: Simplify right side
    138,664.60x = 14,352,207,255.94
  5. Step 5: Solve for x
    x = 14,352,207,255.94/138,664.60
  6. Step 6: Final answer
    x = 103,503.04

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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.