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Finding the Fourth Proportional to 78,719.80, 118,079.70 and 23,315.80

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Solution

The fourth proportional to 78,719.80, 118,079.70 and 23,315.80 is: 34,973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.80 : 118,079.70 = 23,315.80 : x
  2. Step 2: Convert to fraction form
    78,719.80/118,079.70 = 23,315.80/x
  3. Step 3: Cross multiply
    78,719.80x = 118,079.70 × 23,315.80
  4. Step 4: Simplify right side
    78,719.80x = 2,753,122,669.26
  5. Step 5: Solve for x
    x = 2,753,122,669.26/78,719.80
  6. Step 6: Final answer
    x = 34,973.70

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1.5x scale

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.