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Finding the Fourth Proportional to 90,702.40, 136,006.93 and 40,739.62

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Solution

The fourth proportional to 90,702.40, 136,006.93 and 40,739.62 is: 61,088.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,702.40 : 136,006.93 = 40,739.62 : x
  2. Step 2: Convert to fraction form
    90,702.40/136,006.93 = 40,739.62/x
  3. Step 3: Cross multiply
    90,702.40x = 136,006.93 × 40,739.62
  4. Step 4: Simplify right side
    90,702.40x = 5,540,870,645.57
  5. Step 5: Solve for x
    x = 5,540,870,645.57/90,702.40
  6. Step 6: Final answer
    x = 61,088.47

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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.