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Finding the Fourth Proportional to 74,425.50, 102,705.84 and 42,159.96

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Solution

The fourth proportional to 74,425.50, 102,705.84 and 42,159.96 is: 58,179.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,425.50 : 102,705.84 = 42,159.96 : x
  2. Step 2: Convert to fraction form
    74,425.50/102,705.84 = 42,159.96/x
  3. Step 3: Cross multiply
    74,425.50x = 102,705.84 × 42,159.96
  4. Step 4: Simplify right side
    74,425.50x = 4,330,074,106.17
  5. Step 5: Solve for x
    x = 4,330,074,106.17/74,425.50
  6. Step 6: Final answer
    x = 58,179.98

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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.