Home / 78,330.36-108,097.02-42,520.44

Finding the Fourth Proportional to 78,330.36, 108,097.02 and 42,520.44

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Solution

The fourth proportional to 78,330.36, 108,097.02 and 42,520.44 is: 58,678.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,330.36 : 108,097.02 = 42,520.44 : x
  2. Step 2: Convert to fraction form
    78,330.36/108,097.02 = 42,520.44/x
  3. Step 3: Cross multiply
    78,330.36x = 108,097.02 × 42,520.44
  4. Step 4: Simplify right side
    78,330.36x = 4,596,332,853.09
  5. Step 5: Solve for x
    x = 4,596,332,853.09/78,330.36
  6. Step 6: Final answer
    x = 58,678.82

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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.