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Finding the Fourth Proportional to 57,059.81, 78,515.51 and 55,326.38

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Solution

The fourth proportional to 57,059.81, 78,515.51 and 55,326.38 is: 76,130.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,059.81 : 78,515.51 = 55,326.38 : x
  2. Step 2: Convert to fraction form
    57,059.81/78,515.51 = 55,326.38/x
  3. Step 3: Cross multiply
    57,059.81x = 78,515.51 × 55,326.38
  4. Step 4: Simplify right side
    57,059.81x = 4,343,979,276.76
  5. Step 5: Solve for x
    x = 4,343,979,276.76/57,059.81
  6. Step 6: Final answer
    x = 76,130.29

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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.