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Finding the Fourth Proportional to 127,985.60, 191,978.40 and 44,868.80

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Solution

The fourth proportional to 127,985.60, 191,978.40 and 44,868.80 is: 67,303.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,985.60 : 191,978.40 = 44,868.80 : x
  2. Step 2: Convert to fraction form
    127,985.60/191,978.40 = 44,868.80/x
  3. Step 3: Cross multiply
    127,985.60x = 191,978.40 × 44,868.80
  4. Step 4: Simplify right side
    127,985.60x = 8,613,840,433.92
  5. Step 5: Solve for x
    x = 8,613,840,433.92/127,985.60
  6. Step 6: Final answer
    x = 67,303.20

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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.