Home / 72,178.05-99,607.91-40,348.29

Finding the Fourth Proportional to 72,178.05, 99,607.91 and 40,348.29

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Solution

The fourth proportional to 72,178.05, 99,607.91 and 40,348.29 is: 55,681.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,178.05 : 99,607.91 = 40,348.29 : x
  2. Step 2: Convert to fraction form
    72,178.05/99,607.91 = 40,348.29/x
  3. Step 3: Cross multiply
    72,178.05x = 99,607.91 × 40,348.29
  4. Step 4: Simplify right side
    72,178.05x = 4,019,008,838.97
  5. Step 5: Solve for x
    x = 4,019,008,838.97/72,178.05
  6. Step 6: Final answer
    x = 55,681.87

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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.