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Finding the Fourth Proportional to 71,424.60, 98,559.32 and 39,590.79

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Solution

The fourth proportional to 71,424.60, 98,559.32 and 39,590.79 is: 54,631.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,424.60 : 98,559.32 = 39,590.79 : x
  2. Step 2: Convert to fraction form
    71,424.60/98,559.32 = 39,590.79/x
  3. Step 3: Cross multiply
    71,424.60x = 98,559.32 × 39,590.79
  4. Step 4: Simplify right side
    71,424.60x = 3,902,041,340.66
  5. Step 5: Solve for x
    x = 3,902,041,340.66/71,424.60
  6. Step 6: Final answer
    x = 54,631.62

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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.