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Finding the Fourth Proportional to 88,461.68, 121,990.20 and 75,069.68

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Solution

The fourth proportional to 88,461.68, 121,990.20 and 75,069.68 is: 103,522.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,461.68 : 121,990.20 = 75,069.68 : x
  2. Step 2: Convert to fraction form
    88,461.68/121,990.20 = 75,069.68/x
  3. Step 3: Cross multiply
    88,461.68x = 121,990.20 × 75,069.68
  4. Step 4: Simplify right side
    88,461.68x = 9,157,765,277.14
  5. Step 5: Solve for x
    x = 9,157,765,277.14/88,461.68
  6. Step 6: Final answer
    x = 103,522.40

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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.