Home / 72,218.39-99,666.45-40,390.25

Finding the Fourth Proportional to 72,218.39, 99,666.45 and 40,390.25

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Solution

The fourth proportional to 72,218.39, 99,666.45 and 40,390.25 is: 55,741.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,218.39 : 99,666.45 = 40,390.25 : x
  2. Step 2: Convert to fraction form
    72,218.39/99,666.45 = 40,390.25/x
  3. Step 3: Cross multiply
    72,218.39x = 99,666.45 × 40,390.25
  4. Step 4: Simplify right side
    72,218.39x = 4,025,552,333.78
  5. Step 5: Solve for x
    x = 4,025,552,333.78/72,218.39
  6. Step 6: Final answer
    x = 55,741.38

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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.