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Finding the Fourth Proportional to 101,275.68, 139,748.40 and 60,988.80

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Solution

The fourth proportional to 101,275.68, 139,748.40 and 60,988.80 is: 84,157.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,275.68 : 139,748.40 = 60,988.80 : x
  2. Step 2: Convert to fraction form
    101,275.68/139,748.40 = 60,988.80/x
  3. Step 3: Cross multiply
    101,275.68x = 139,748.40 × 60,988.80
  4. Step 4: Simplify right side
    101,275.68x = 8,523,087,217.92
  5. Step 5: Solve for x
    x = 8,523,087,217.92/101,275.68
  6. Step 6: Final answer
    x = 84,157.29

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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.