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Finding the Fourth Proportional to 66,647.68, 91,981.88 and 38,352.76

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Solution

The fourth proportional to 66,647.68, 91,981.88 and 38,352.76 is: 52,931.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,647.68 : 91,981.88 = 38,352.76 : x
  2. Step 2: Convert to fraction form
    66,647.68/91,981.88 = 38,352.76/x
  3. Step 3: Cross multiply
    66,647.68x = 91,981.88 × 38,352.76
  4. Step 4: Simplify right side
    66,647.68x = 3,527,758,967.99
  5. Step 5: Solve for x
    x = 3,527,758,967.99/66,647.68
  6. Step 6: Final answer
    x = 52,931.46

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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.