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Finding the Fourth Proportional to 57,065.54, 78,748.67 and 31,570.38

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Solution

The fourth proportional to 57,065.54, 78,748.67 and 31,570.38 is: 43,566.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,065.54 : 78,748.67 = 31,570.38 : x
  2. Step 2: Convert to fraction form
    57,065.54/78,748.67 = 31,570.38/x
  3. Step 3: Cross multiply
    57,065.54x = 78,748.67 × 31,570.38
  4. Step 4: Simplify right side
    57,065.54x = 2,486,125,515.32
  5. Step 5: Solve for x
    x = 2,486,125,515.32/57,065.54
  6. Step 6: Final answer
    x = 43,566.15

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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.