Home / 72,020.16-99,387.68-40,187.16

Finding the Fourth Proportional to 72,020.16, 99,387.68 and 40,187.16

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Solution

The fourth proportional to 72,020.16, 99,387.68 and 40,187.16 is: 55,458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,020.16 : 99,387.68 = 40,187.16 : x
  2. Step 2: Convert to fraction form
    72,020.16/99,387.68 = 40,187.16/x
  3. Step 3: Cross multiply
    72,020.16x = 99,387.68 × 40,187.16
  4. Step 4: Simplify right side
    72,020.16x = 3,994,108,397.25
  5. Step 5: Solve for x
    x = 3,994,108,397.25/72,020.16
  6. Step 6: Final answer
    x = 55,458.20

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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.