Home / 72,154.10-99,572.37-40,322.99

Finding the Fourth Proportional to 72,154.10, 99,572.37 and 40,322.99

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Solution

The fourth proportional to 72,154.10, 99,572.37 and 40,322.99 is: 55,645.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,154.10 : 99,572.37 = 40,322.99 : x
  2. Step 2: Convert to fraction form
    72,154.10/99,572.37 = 40,322.99/x
  3. Step 3: Cross multiply
    72,154.10x = 99,572.37 × 40,322.99
  4. Step 4: Simplify right side
    72,154.10x = 4,015,055,679.79
  5. Step 5: Solve for x
    x = 4,015,055,679.79/72,154.10
  6. Step 6: Final answer
    x = 55,645.57

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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.