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Finding the Fourth Proportional to 72,974.71, 100,710.80 and 40,719.48

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Solution

The fourth proportional to 72,974.71, 100,710.80 and 40,719.48 is: 56,196.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,974.71 : 100,710.80 = 40,719.48 : x
  2. Step 2: Convert to fraction form
    72,974.71/100,710.80 = 40,719.48/x
  3. Step 3: Cross multiply
    72,974.71x = 100,710.80 × 40,719.48
  4. Step 4: Simplify right side
    72,974.71x = 4,100,891,406.38
  5. Step 5: Solve for x
    x = 4,100,891,406.38/72,974.71
  6. Step 6: Final answer
    x = 56,196.06

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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.