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Finding the Fourth Proportional to 78,658.54, 118,005.08 and 57,818.86

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Solution

The fourth proportional to 78,658.54, 118,005.08 and 57,818.86 is: 86,740.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,658.54 : 118,005.08 = 57,818.86 : x
  2. Step 2: Convert to fraction form
    78,658.54/118,005.08 = 57,818.86/x
  3. Step 3: Cross multiply
    78,658.54x = 118,005.08 × 57,818.86
  4. Step 4: Simplify right side
    78,658.54x = 6,822,919,199.81
  5. Step 5: Solve for x
    x = 6,822,919,199.81/78,658.54
  6. Step 6: Final answer
    x = 86,740.98

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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.