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Finding the Fourth Proportional to 71,394.84, 98,523.70 and 39,129.21

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Solution

The fourth proportional to 71,394.84, 98,523.70 and 39,129.21 is: 53,997.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,394.84 : 98,523.70 = 39,129.21 : x
  2. Step 2: Convert to fraction form
    71,394.84/98,523.70 = 39,129.21/x
  3. Step 3: Cross multiply
    71,394.84x = 98,523.70 × 39,129.21
  4. Step 4: Simplify right side
    71,394.84x = 3,855,154,547.28
  5. Step 5: Solve for x
    x = 3,855,154,547.28/71,394.84
  6. Step 6: Final answer
    x = 53,997.66

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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.