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Finding the Fourth Proportional to 78,871.86, 108,838.53 and 45,337.86

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Solution

The fourth proportional to 78,871.86, 108,838.53 and 45,337.86 is: 62,563.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,871.86 : 108,838.53 = 45,337.86 : x
  2. Step 2: Convert to fraction form
    78,871.86/108,838.53 = 45,337.86/x
  3. Step 3: Cross multiply
    78,871.86x = 108,838.53 × 45,337.86
  4. Step 4: Simplify right side
    78,871.86x = 4,934,506,035.75
  5. Step 5: Solve for x
    x = 4,934,506,035.75/78,871.86
  6. Step 6: Final answer
    x = 62,563.58

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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.