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Finding the Fourth Proportional to 111,490.32, 153,853.85 and 63,740.62

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Solution

The fourth proportional to 111,490.32, 153,853.85 and 63,740.62 is: 87,960.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,490.32 : 153,853.85 = 63,740.62 : x
  2. Step 2: Convert to fraction form
    111,490.32/153,853.85 = 63,740.62/x
  3. Step 3: Cross multiply
    111,490.32x = 153,853.85 × 63,740.62
  4. Step 4: Simplify right side
    111,490.32x = 9,806,738,700.41
  5. Step 5: Solve for x
    x = 9,806,738,700.41/111,490.32
  6. Step 6: Final answer
    x = 87,960.45

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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.