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Finding the Fourth Proportional to 63,316.33, 87,393.81 and 39,428.89

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Solution

The fourth proportional to 63,316.33, 87,393.81 and 39,428.89 is: 54,422.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,316.33 : 87,393.81 = 39,428.89 : x
  2. Step 2: Convert to fraction form
    63,316.33/87,393.81 = 39,428.89/x
  3. Step 3: Cross multiply
    63,316.33x = 87,393.81 × 39,428.89
  4. Step 4: Simplify right side
    63,316.33x = 3,445,840,921.17
  5. Step 5: Solve for x
    x = 3,445,840,921.17/63,316.33
  6. Step 6: Final answer
    x = 54,422.63

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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.