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Finding the Fourth Proportional to 71,534.84, 98,718.06 and 39,703.72

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Solution

The fourth proportional to 71,534.84, 98,718.06 and 39,703.72 is: 54,791.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,534.84 : 98,718.06 = 39,703.72 : x
  2. Step 2: Convert to fraction form
    71,534.84/98,718.06 = 39,703.72/x
  3. Step 3: Cross multiply
    71,534.84x = 98,718.06 × 39,703.72
  4. Step 4: Simplify right side
    71,534.84x = 3,919,474,213.18
  5. Step 5: Solve for x
    x = 3,919,474,213.18/71,534.84
  6. Step 6: Final answer
    x = 54,791.12

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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.