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Finding the Fourth Proportional to 128,056.65, 176,766.60 and 96,317.20

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Solution

The fourth proportional to 128,056.65, 176,766.60 and 96,317.20 is: 132,954.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,056.65 : 176,766.60 = 96,317.20 : x
  2. Step 2: Convert to fraction form
    128,056.65/176,766.60 = 96,317.20/x
  3. Step 3: Cross multiply
    128,056.65x = 176,766.60 × 96,317.20
  4. Step 4: Simplify right side
    128,056.65x = 17,025,663,965.52
  5. Step 5: Solve for x
    x = 17,025,663,965.52/128,056.65
  6. Step 6: Final answer
    x = 132,954.16

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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.