Home / 137,789.20-190,134.40-77,366.49

Finding the Fourth Proportional to 137,789.20, 190,134.40 and 77,366.49

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Solution

The fourth proportional to 137,789.20, 190,134.40 and 77,366.49 is: 106,757.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,789.20 : 190,134.40 = 77,366.49 : x
  2. Step 2: Convert to fraction form
    137,789.20/190,134.40 = 77,366.49/x
  3. Step 3: Cross multiply
    137,789.20x = 190,134.40 × 77,366.49
  4. Step 4: Simplify right side
    137,789.20x = 14,710,031,156.26
  5. Step 5: Solve for x
    x = 14,710,031,156.26/137,789.20
  6. Step 6: Final answer
    x = 106,757.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.