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Finding the Fourth Proportional to 109,728.12, 151,437.12 and 61,984.54

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Solution

The fourth proportional to 109,728.12, 151,437.12 and 61,984.54 is: 85,545.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,728.12 : 151,437.12 = 61,984.54 : x
  2. Step 2: Convert to fraction form
    109,728.12/151,437.12 = 61,984.54/x
  3. Step 3: Cross multiply
    109,728.12x = 151,437.12 × 61,984.54
  4. Step 4: Simplify right side
    109,728.12x = 9,386,759,464.94
  5. Step 5: Solve for x
    x = 9,386,759,464.94/109,728.12
  6. Step 6: Final answer
    x = 85,545.62

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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.