Home / 57,218.28-78,960.30-31,376.74

Finding the Fourth Proportional to 57,218.28, 78,960.30 and 31,376.74

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Solution

The fourth proportional to 57,218.28, 78,960.30 and 31,376.74 is: 43,299.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,218.28 : 78,960.30 = 31,376.74 : x
  2. Step 2: Convert to fraction form
    57,218.28/78,960.30 = 31,376.74/x
  3. Step 3: Cross multiply
    57,218.28x = 78,960.30 × 31,376.74
  4. Step 4: Simplify right side
    57,218.28x = 2,477,516,803.42
  5. Step 5: Solve for x
    x = 2,477,516,803.42/57,218.28
  6. Step 6: Final answer
    x = 43,299.39

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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.