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Finding the Fourth Proportional to 66,694.38, 99,930.50 and 46,931.40

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Solution

The fourth proportional to 66,694.38, 99,930.50 and 46,931.40 is: 70,318.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,694.38 : 99,930.50 = 46,931.40 : x
  2. Step 2: Convert to fraction form
    66,694.38/99,930.50 = 46,931.40/x
  3. Step 3: Cross multiply
    66,694.38x = 99,930.50 × 46,931.40
  4. Step 4: Simplify right side
    66,694.38x = 4,689,878,267.70
  5. Step 5: Solve for x
    x = 4,689,878,267.70/66,694.38
  6. Step 6: Final answer
    x = 70,318.94

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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.