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Finding the Fourth Proportional to 107,818.40, 161,785.20 and 48,663.20

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Solution

The fourth proportional to 107,818.40, 161,785.20 and 48,663.20 is: 73,020.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,818.40 : 161,785.20 = 48,663.20 : x
  2. Step 2: Convert to fraction form
    107,818.40/161,785.20 = 48,663.20/x
  3. Step 3: Cross multiply
    107,818.40x = 161,785.20 × 48,663.20
  4. Step 4: Simplify right side
    107,818.40x = 7,872,985,544.64
  5. Step 5: Solve for x
    x = 7,872,985,544.64/107,818.40
  6. Step 6: Final answer
    x = 73,020.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.