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Finding the Fourth Proportional to 128,232.79, 176,960.63 and 70,876.15

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Solution

The fourth proportional to 128,232.79, 176,960.63 and 70,876.15 is: 97,808.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,232.79 : 176,960.63 = 70,876.15 : x
  2. Step 2: Convert to fraction form
    128,232.79/176,960.63 = 70,876.15/x
  3. Step 3: Cross multiply
    128,232.79x = 176,960.63 × 70,876.15
  4. Step 4: Simplify right side
    128,232.79x = 12,542,287,890.76
  5. Step 5: Solve for x
    x = 12,542,287,890.76/128,232.79
  6. Step 6: Final answer
    x = 97,808.74

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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.