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Finding the Fourth Proportional to 78,407.90, 108,203.33 and 48,212.95

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Solution

The fourth proportional to 78,407.90, 108,203.33 and 48,212.95 is: 66,534.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,407.90 : 108,203.33 = 48,212.95 : x
  2. Step 2: Convert to fraction form
    78,407.90/108,203.33 = 48,212.95/x
  3. Step 3: Cross multiply
    78,407.90x = 108,203.33 × 48,212.95
  4. Step 4: Simplify right side
    78,407.90x = 5,216,801,498.06
  5. Step 5: Solve for x
    x = 5,216,801,498.06/78,407.90
  6. Step 6: Final answer
    x = 66,534.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.