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Finding the Fourth Proportional to 88,422.57, 121,987.01 and 54,420.80

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Solution

The fourth proportional to 88,422.57, 121,987.01 and 54,420.80 is: 75,078.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,422.57 : 121,987.01 = 54,420.80 : x
  2. Step 2: Convert to fraction form
    88,422.57/121,987.01 = 54,420.80/x
  3. Step 3: Cross multiply
    88,422.57x = 121,987.01 × 54,420.80
  4. Step 4: Simplify right side
    88,422.57x = 6,638,630,199.92
  5. Step 5: Solve for x
    x = 6,638,630,199.92/88,422.57
  6. Step 6: Final answer
    x = 75,078.46

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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.