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Finding the Fourth Proportional to 57,070.56, 78,760.08 and 31,918.08

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Solution

The fourth proportional to 57,070.56, 78,760.08 and 31,918.08 is: 44,048.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,070.56 : 78,760.08 = 31,918.08 : x
  2. Step 2: Convert to fraction form
    57,070.56/78,760.08 = 31,918.08/x
  3. Step 3: Cross multiply
    57,070.56x = 78,760.08 × 31,918.08
  4. Step 4: Simplify right side
    57,070.56x = 2,513,870,534.25
  5. Step 5: Solve for x
    x = 2,513,870,534.25/57,070.56
  6. Step 6: Final answer
    x = 44,048.46

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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.