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Finding the Fourth Proportional to 78,862.80, 118,367.10 and 39,448.20

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Solution

The fourth proportional to 78,862.80, 118,367.10 and 39,448.20 is: 59,208.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,862.80 : 118,367.10 = 39,448.20 : x
  2. Step 2: Convert to fraction form
    78,862.80/118,367.10 = 39,448.20/x
  3. Step 3: Cross multiply
    78,862.80x = 118,367.10 × 39,448.20
  4. Step 4: Simplify right side
    78,862.80x = 4,669,369,034.22
  5. Step 5: Solve for x
    x = 4,669,369,034.22/78,862.80
  6. Step 6: Final answer
    x = 59,208.77

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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.