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Finding the Fourth Proportional to 128,041.48, 176,709 and 70,691.05

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Solution

The fourth proportional to 128,041.48, 176,709 and 70,691.05 is: 97,560.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,041.48 : 176,709 = 70,691.05 : x
  2. Step 2: Convert to fraction form
    128,041.48/176,709 = 70,691.05/x
  3. Step 3: Cross multiply
    128,041.48x = 176,709 × 70,691.05
  4. Step 4: Simplify right side
    128,041.48x = 12,491,744,754.45
  5. Step 5: Solve for x
    x = 12,491,744,754.45/128,041.48
  6. Step 6: Final answer
    x = 97,560.14

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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.