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Finding the Fourth Proportional to 128,082.48, 176,759.74 and 70,729.90

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Solution

The fourth proportional to 128,082.48, 176,759.74 and 70,729.90 is: 97,610.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,082.48 : 176,759.74 = 70,729.90 : x
  2. Step 2: Convert to fraction form
    128,082.48/176,759.74 = 70,729.90/x
  3. Step 3: Cross multiply
    128,082.48x = 176,759.74 × 70,729.90
  4. Step 4: Simplify right side
    128,082.48x = 12,502,198,734.23
  5. Step 5: Solve for x
    x = 12,502,198,734.23/128,082.48
  6. Step 6: Final answer
    x = 97,610.53

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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.