Home / 57,009.13-78,665.78-31,512.05

Finding the Fourth Proportional to 57,009.13, 78,665.78 and 31,512.05

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Solution

The fourth proportional to 57,009.13, 78,665.78 and 31,512.05 is: 43,482.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,009.13 : 78,665.78 = 31,512.05 : x
  2. Step 2: Convert to fraction form
    57,009.13/78,665.78 = 31,512.05/x
  3. Step 3: Cross multiply
    57,009.13x = 78,665.78 × 31,512.05
  4. Step 4: Simplify right side
    57,009.13x = 2,478,920,083.72
  5. Step 5: Solve for x
    x = 2,478,920,083.72/57,009.13
  6. Step 6: Final answer
    x = 43,482.86

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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.