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Finding the Fourth Proportional to 127,886.70, 191,570.85 and 72,417.90

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Solution

The fourth proportional to 127,886.70, 191,570.85 and 72,417.90 is: 108,480.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,886.70 : 191,570.85 = 72,417.90 : x
  2. Step 2: Convert to fraction form
    127,886.70/191,570.85 = 72,417.90/x
  3. Step 3: Cross multiply
    127,886.70x = 191,570.85 × 72,417.90
  4. Step 4: Simplify right side
    127,886.70x = 13,873,158,658.22
  5. Step 5: Solve for x
    x = 13,873,158,658.22/127,886.70
  6. Step 6: Final answer
    x = 108,480.07

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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.