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Finding the Fourth Proportional to 70,766.96, 97,660.80 and 38,937.20

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Solution

The fourth proportional to 70,766.96, 97,660.80 and 38,937.20 is: 53,734.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,766.96 : 97,660.80 = 38,937.20 : x
  2. Step 2: Convert to fraction form
    70,766.96/97,660.80 = 38,937.20/x
  3. Step 3: Cross multiply
    70,766.96x = 97,660.80 × 38,937.20
  4. Step 4: Simplify right side
    70,766.96x = 3,802,638,101.76
  5. Step 5: Solve for x
    x = 3,802,638,101.76/70,766.96
  6. Step 6: Final answer
    x = 53,734.65

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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.