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Finding the Fourth Proportional to 72,990.88, 109,437.68 and 26,237.68

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Solution

The fourth proportional to 72,990.88, 109,437.68 and 26,237.68 is: 39,339.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,990.88 : 109,437.68 = 26,237.68 : x
  2. Step 2: Convert to fraction form
    72,990.88/109,437.68 = 26,237.68/x
  3. Step 3: Cross multiply
    72,990.88x = 109,437.68 × 26,237.68
  4. Step 4: Simplify right side
    72,990.88x = 2,871,390,827.78
  5. Step 5: Solve for x
    x = 2,871,390,827.78/72,990.88
  6. Step 6: Final answer
    x = 39,339.04

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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.