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Finding the Fourth Proportional to 90,868, 125,397.80 and 50,580.92

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Solution

The fourth proportional to 90,868, 125,397.80 and 50,580.92 is: 69,801.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,868 : 125,397.80 = 50,580.92 : x
  2. Step 2: Convert to fraction form
    90,868/125,397.80 = 50,580.92/x
  3. Step 3: Cross multiply
    90,868x = 125,397.80 × 50,580.92
  4. Step 4: Simplify right side
    90,868x = 6,342,736,089.98
  5. Step 5: Solve for x
    x = 6,342,736,089.98/90,868
  6. Step 6: Final answer
    x = 69,801.65

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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.