Home / 72,143.61-99,560.39-40,313.85

Finding the Fourth Proportional to 72,143.61, 99,560.39 and 40,313.85

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Solution

The fourth proportional to 72,143.61, 99,560.39 and 40,313.85 is: 55,634.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,143.61 : 99,560.39 = 40,313.85 : x
  2. Step 2: Convert to fraction form
    72,143.61/99,560.39 = 40,313.85/x
  3. Step 3: Cross multiply
    72,143.61x = 99,560.39 × 40,313.85
  4. Step 4: Simplify right side
    72,143.61x = 4,013,662,426.83
  5. Step 5: Solve for x
    x = 4,013,662,426.83/72,143.61
  6. Step 6: Final answer
    x = 55,634.34

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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.