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Finding the Fourth Proportional to 138,592.68, 191,258.36 and 74,930.93

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Solution

The fourth proportional to 138,592.68, 191,258.36 and 74,930.93 is: 103,404.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,592.68 : 191,258.36 = 74,930.93 : x
  2. Step 2: Convert to fraction form
    138,592.68/191,258.36 = 74,930.93/x
  3. Step 3: Cross multiply
    138,592.68x = 191,258.36 × 74,930.93
  4. Step 4: Simplify right side
    138,592.68x = 14,331,166,785.07
  5. Step 5: Solve for x
    x = 14,331,166,785.07/138,592.68
  6. Step 6: Final answer
    x = 103,404.93

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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.