Home / 78,981.20-118,477.92-26,390.87

Finding the Fourth Proportional to 78,981.20, 118,477.92 and 26,390.87

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Solution

The fourth proportional to 78,981.20, 118,477.92 and 26,390.87 is: 39,588.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,981.20 : 118,477.92 = 26,390.87 : x
  2. Step 2: Convert to fraction form
    78,981.20/118,477.92 = 26,390.87/x
  3. Step 3: Cross multiply
    78,981.20x = 118,477.92 × 26,390.87
  4. Step 4: Simplify right side
    78,981.20x = 3,126,734,792.20
  5. Step 5: Solve for x
    x = 3,126,734,792.20/78,981.20
  6. Step 6: Final answer
    x = 39,588.34

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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.