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Finding the Fourth Proportional to 128,591.95, 177,795.51 and 112,630.60

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Solution

The fourth proportional to 128,591.95, 177,795.51 and 112,630.60 is: 155,726.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,591.95 : 177,795.51 = 112,630.60 : x
  2. Step 2: Convert to fraction form
    128,591.95/177,795.51 = 112,630.60/x
  3. Step 3: Cross multiply
    128,591.95x = 177,795.51 × 112,630.60
  4. Step 4: Simplify right side
    128,591.95x = 20,025,214,968.61
  5. Step 5: Solve for x
    x = 20,025,214,968.61/128,591.95
  6. Step 6: Final answer
    x = 155,726.82

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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.