Home / 78,738.14-118,156.19-31,991.01

Finding the Fourth Proportional to 78,738.14, 118,156.19 and 31,991.01

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Solution

The fourth proportional to 78,738.14, 118,156.19 and 31,991.01 is: 48,006.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,738.14 : 118,156.19 = 31,991.01 : x
  2. Step 2: Convert to fraction form
    78,738.14/118,156.19 = 31,991.01/x
  3. Step 3: Cross multiply
    78,738.14x = 118,156.19 × 31,991.01
  4. Step 4: Simplify right side
    78,738.14x = 3,779,935,695.90
  5. Step 5: Solve for x
    x = 3,779,935,695.90/78,738.14
  6. Step 6: Final answer
    x = 48,006.42

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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.