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Finding the Fourth Proportional to 90,849.60, 125,323.20 and 65,707.20

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Solution

The fourth proportional to 90,849.60, 125,323.20 and 65,707.20 is: 90,640.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,849.60 : 125,323.20 = 65,707.20 : x
  2. Step 2: Convert to fraction form
    90,849.60/125,323.20 = 65,707.20/x
  3. Step 3: Cross multiply
    90,849.60x = 125,323.20 × 65,707.20
  4. Step 4: Simplify right side
    90,849.60x = 8,234,636,567.04
  5. Step 5: Solve for x
    x = 8,234,636,567.04/90,849.60
  6. Step 6: Final answer
    x = 90,640.32

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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.