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Finding the Fourth Proportional to 105,591.92, 145,661.64 and 65,292.80

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Solution

The fourth proportional to 105,591.92, 145,661.64 and 65,292.80 is: 90,069.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,591.92 : 145,661.64 = 65,292.80 : x
  2. Step 2: Convert to fraction form
    105,591.92/145,661.64 = 65,292.80/x
  3. Step 3: Cross multiply
    105,591.92x = 145,661.64 × 65,292.80
  4. Step 4: Simplify right side
    105,591.92x = 9,510,656,328.19
  5. Step 5: Solve for x
    x = 9,510,656,328.19/105,591.92
  6. Step 6: Final answer
    x = 90,069.93

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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.