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Finding the Fourth Proportional to 145,590.30, 218,320.65 and 66,728.70

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Solution

The fourth proportional to 145,590.30, 218,320.65 and 66,728.70 is: 100,063.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,590.30 : 218,320.65 = 66,728.70 : x
  2. Step 2: Convert to fraction form
    145,590.30/218,320.65 = 66,728.70/x
  3. Step 3: Cross multiply
    145,590.30x = 218,320.65 × 66,728.70
  4. Step 4: Simplify right side
    145,590.30x = 14,568,253,157.66
  5. Step 5: Solve for x
    x = 14,568,253,157.66/145,590.30
  6. Step 6: Final answer
    x = 100,063.35

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1.5x scale

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.