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Finding the Fourth Proportional to 66,513.70, 99,770.55 and 31,521.70

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Solution

The fourth proportional to 66,513.70, 99,770.55 and 31,521.70 is: 47,282.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,513.70 : 99,770.55 = 31,521.70 : x
  2. Step 2: Convert to fraction form
    66,513.70/99,770.55 = 31,521.70/x
  3. Step 3: Cross multiply
    66,513.70x = 99,770.55 × 31,521.70
  4. Step 4: Simplify right side
    66,513.70x = 3,144,937,345.94
  5. Step 5: Solve for x
    x = 3,144,937,345.94/66,513.70
  6. Step 6: Final answer
    x = 47,282.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.