Home / 72,147.24-99,561.28-40,316.40

Finding the Fourth Proportional to 72,147.24, 99,561.28 and 40,316.40

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Solution

The fourth proportional to 72,147.24, 99,561.28 and 40,316.40 is: 55,635.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,147.24 : 99,561.28 = 40,316.40 : x
  2. Step 2: Convert to fraction form
    72,147.24/99,561.28 = 40,316.40/x
  3. Step 3: Cross multiply
    72,147.24x = 99,561.28 × 40,316.40
  4. Step 4: Simplify right side
    72,147.24x = 4,013,952,388.99
  5. Step 5: Solve for x
    x = 4,013,952,388.99/72,147.24
  6. Step 6: Final answer
    x = 55,635.56

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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.