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Finding the Fourth Proportional to 65,708.47, 90,677.72 and 35,493.79

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Solution

The fourth proportional to 65,708.47, 90,677.72 and 35,493.79 is: 48,981.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,708.47 : 90,677.72 = 35,493.79 : x
  2. Step 2: Convert to fraction form
    65,708.47/90,677.72 = 35,493.79/x
  3. Step 3: Cross multiply
    65,708.47x = 90,677.72 × 35,493.79
  4. Step 4: Simplify right side
    65,708.47x = 3,218,495,813.40
  5. Step 5: Solve for x
    x = 3,218,495,813.40/65,708.47
  6. Step 6: Final answer
    x = 48,981.45

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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.