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Finding the Fourth Proportional to 109,662.87, 151,326.32 and 61,920.93

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Solution

The fourth proportional to 109,662.87, 151,326.32 and 61,920.93 is: 85,446.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,662.87 : 151,326.32 = 61,920.93 : x
  2. Step 2: Convert to fraction form
    109,662.87/151,326.32 = 61,920.93/x
  3. Step 3: Cross multiply
    109,662.87x = 151,326.32 × 61,920.93
  4. Step 4: Simplify right side
    109,662.87x = 9,370,266,158.27
  5. Step 5: Solve for x
    x = 9,370,266,158.27/109,662.87
  6. Step 6: Final answer
    x = 85,446.11

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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.