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Finding the Fourth Proportional to 71,144.40, 98,186.88 and 40,931.04

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Solution

The fourth proportional to 71,144.40, 98,186.88 and 40,931.04 is: 56,489.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,144.40 : 98,186.88 = 40,931.04 : x
  2. Step 2: Convert to fraction form
    71,144.40/98,186.88 = 40,931.04/x
  3. Step 3: Cross multiply
    71,144.40x = 98,186.88 × 40,931.04
  4. Step 4: Simplify right side
    71,144.40x = 4,018,891,112.76
  5. Step 5: Solve for x
    x = 4,018,891,112.76/71,144.40
  6. Step 6: Final answer
    x = 56,489.21

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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.