Home / 78,822.91-118,241.70-31,426.53

Finding the Fourth Proportional to 78,822.91, 118,241.70 and 31,426.53

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Solution

The fourth proportional to 78,822.91, 118,241.70 and 31,426.53 is: 47,142.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,822.91 : 118,241.70 = 31,426.53 : x
  2. Step 2: Convert to fraction form
    78,822.91/118,241.70 = 31,426.53/x
  3. Step 3: Cross multiply
    78,822.91x = 118,241.70 × 31,426.53
  4. Step 4: Simplify right side
    78,822.91x = 3,715,926,332.30
  5. Step 5: Solve for x
    x = 3,715,926,332.30/78,822.91
  6. Step 6: Final answer
    x = 47,142.72

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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.