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Finding the Fourth Proportional to 105,666.06, 145,834.08 and 65,392.80

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Solution

The fourth proportional to 105,666.06, 145,834.08 and 65,392.80 is: 90,251.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,666.06 : 145,834.08 = 65,392.80 : x
  2. Step 2: Convert to fraction form
    105,666.06/145,834.08 = 65,392.80/x
  3. Step 3: Cross multiply
    105,666.06x = 145,834.08 × 65,392.80
  4. Step 4: Simplify right side
    105,666.06x = 9,536,498,826.62
  5. Step 5: Solve for x
    x = 9,536,498,826.62/105,666.06
  6. Step 6: Final answer
    x = 90,251.30

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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.