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Finding the Fourth Proportional to 66,702.40, 99,942.48 and 46,939.40

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Solution

The fourth proportional to 66,702.40, 99,942.48 and 46,939.40 is: 70,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,702.40 : 99,942.48 = 46,939.40 : x
  2. Step 2: Convert to fraction form
    66,702.40/99,942.48 = 46,939.40/x
  3. Step 3: Cross multiply
    66,702.40x = 99,942.48 × 46,939.40
  4. Step 4: Simplify right side
    66,702.40x = 4,691,240,045.71
  5. Step 5: Solve for x
    x = 4,691,240,045.71/66,702.40
  6. Step 6: Final answer
    x = 70,330.90

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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.