Home / 115,487.56-159,312.18-72,972.28

Finding the Fourth Proportional to 115,487.56, 159,312.18 and 72,972.28

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Solution

The fourth proportional to 115,487.56, 159,312.18 and 72,972.28 is: 100,663.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,487.56 : 159,312.18 = 72,972.28 : x
  2. Step 2: Convert to fraction form
    115,487.56/159,312.18 = 72,972.28/x
  3. Step 3: Cross multiply
    115,487.56x = 159,312.18 × 72,972.28
  4. Step 4: Simplify right side
    115,487.56x = 11,625,373,006.37
  5. Step 5: Solve for x
    x = 11,625,373,006.37/115,487.56
  6. Step 6: Final answer
    x = 100,663.42

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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.