Home / 57,156.68-78,876.21-31,316.15

Finding the Fourth Proportional to 57,156.68, 78,876.21 and 31,316.15

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Solution

The fourth proportional to 57,156.68, 78,876.21 and 31,316.15 is: 43,216.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,156.68 : 78,876.21 = 31,316.15 : x
  2. Step 2: Convert to fraction form
    57,156.68/78,876.21 = 31,316.15/x
  3. Step 3: Cross multiply
    57,156.68x = 78,876.21 × 31,316.15
  4. Step 4: Simplify right side
    57,156.68x = 2,470,099,223.79
  5. Step 5: Solve for x
    x = 2,470,099,223.79/57,156.68
  6. Step 6: Final answer
    x = 43,216.28

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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.