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Finding the Fourth Proportional to 138,455.74, 191,068.68 and 74,793.34

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Solution

The fourth proportional to 138,455.74, 191,068.68 and 74,793.34 is: 103,214.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,455.74 : 191,068.68 = 74,793.34 : x
  2. Step 2: Convert to fraction form
    138,455.74/191,068.68 = 74,793.34/x
  3. Step 3: Cross multiply
    138,455.74x = 191,068.68 × 74,793.34
  4. Step 4: Simplify right side
    138,455.74x = 14,290,664,746.59
  5. Step 5: Solve for x
    x = 14,290,664,746.59/138,455.74
  6. Step 6: Final answer
    x = 103,214.68

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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.