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Finding the Fourth Proportional to 127,451.60, 191,323.20 and 74,890.70

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Solution

The fourth proportional to 127,451.60, 191,323.20 and 74,890.70 is: 112,421.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,451.60 : 191,323.20 = 74,890.70 : x
  2. Step 2: Convert to fraction form
    127,451.60/191,323.20 = 74,890.70/x
  3. Step 3: Cross multiply
    127,451.60x = 191,323.20 × 74,890.70
  4. Step 4: Simplify right side
    127,451.60x = 14,328,328,374.24
  5. Step 5: Solve for x
    x = 14,328,328,374.24/127,451.60
  6. Step 6: Final answer
    x = 112,421.72

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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.