Home / 72,151.85-99,569.30-40,320.74

Finding the Fourth Proportional to 72,151.85, 99,569.30 and 40,320.74

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Solution

The fourth proportional to 72,151.85, 99,569.30 and 40,320.74 is: 55,642.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,151.85 : 99,569.30 = 40,320.74 : x
  2. Step 2: Convert to fraction form
    72,151.85/99,569.30 = 40,320.74/x
  3. Step 3: Cross multiply
    72,151.85x = 99,569.30 × 40,320.74
  4. Step 4: Simplify right side
    72,151.85x = 4,014,707,157.83
  5. Step 5: Solve for x
    x = 4,014,707,157.83/72,151.85
  6. Step 6: Final answer
    x = 55,642.47

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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.