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Finding the Fourth Proportional to 137,353.61, 189,470.58 and 79,986.17

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Solution

The fourth proportional to 137,353.61, 189,470.58 and 79,986.17 is: 110,335.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,353.61 : 189,470.58 = 79,986.17 : x
  2. Step 2: Convert to fraction form
    137,353.61/189,470.58 = 79,986.17/x
  3. Step 3: Cross multiply
    137,353.61x = 189,470.58 × 79,986.17
  4. Step 4: Simplify right side
    137,353.61x = 15,155,025,074.53
  5. Step 5: Solve for x
    x = 15,155,025,074.53/137,353.61
  6. Step 6: Final answer
    x = 110,335.84

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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.