Home / 78,785.28-118,162.56-23,381.76

Finding the Fourth Proportional to 78,785.28, 118,162.56 and 23,381.76

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Solution

The fourth proportional to 78,785.28, 118,162.56 and 23,381.76 is: 35,068.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,785.28 : 118,162.56 = 23,381.76 : x
  2. Step 2: Convert to fraction form
    78,785.28/118,162.56 = 23,381.76/x
  3. Step 3: Cross multiply
    78,785.28x = 118,162.56 × 23,381.76
  4. Step 4: Simplify right side
    78,785.28x = 2,762,848,618.91
  5. Step 5: Solve for x
    x = 2,762,848,618.91/78,785.28
  6. Step 6: Final answer
    x = 35,068.08

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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.