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Finding the Fourth Proportional to 71,409.39, 98,543.46 and 39,578.01

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Solution

The fourth proportional to 71,409.39, 98,543.46 and 39,578.01 is: 54,616.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,409.39 : 98,543.46 = 39,578.01 : x
  2. Step 2: Convert to fraction form
    71,409.39/98,543.46 = 39,578.01/x
  3. Step 3: Cross multiply
    71,409.39x = 98,543.46 × 39,578.01
  4. Step 4: Simplify right side
    71,409.39x = 3,900,154,045.31
  5. Step 5: Solve for x
    x = 3,900,154,045.31/71,409.39
  6. Step 6: Final answer
    x = 54,616.82

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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.