Home / 109,728.02-151,423.86-61,990.70

Finding the Fourth Proportional to 109,728.02, 151,423.86 and 61,990.70

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Solution

The fourth proportional to 109,728.02, 151,423.86 and 61,990.70 is: 85,546.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,728.02 : 151,423.86 = 61,990.70 : x
  2. Step 2: Convert to fraction form
    109,728.02/151,423.86 = 61,990.70/x
  3. Step 3: Cross multiply
    109,728.02x = 151,423.86 × 61,990.70
  4. Step 4: Simplify right side
    109,728.02x = 9,386,871,078.10
  5. Step 5: Solve for x
    x = 9,386,871,078.10/109,728.02
  6. Step 6: Final answer
    x = 85,546.71

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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.