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Finding the Fourth Proportional to 103,780.66, 156,308.87 and 96,479.86

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Solution

The fourth proportional to 103,780.66, 156,308.87 and 96,479.86 is: 145,312.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,780.66 : 156,308.87 = 96,479.86 : x
  2. Step 2: Convert to fraction form
    103,780.66/156,308.87 = 96,479.86/x
  3. Step 3: Cross multiply
    103,780.66x = 156,308.87 × 96,479.86
  4. Step 4: Simplify right side
    103,780.66x = 15,080,657,894.36
  5. Step 5: Solve for x
    x = 15,080,657,894.36/103,780.66
  6. Step 6: Final answer
    x = 145,312.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.