Home / 78,681.55-108,576.66-42,869.41

Finding the Fourth Proportional to 78,681.55, 108,576.66 and 42,869.41

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Solution

The fourth proportional to 78,681.55, 108,576.66 and 42,869.41 is: 59,157.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,681.55 : 108,576.66 = 42,869.41 : x
  2. Step 2: Convert to fraction form
    78,681.55/108,576.66 = 42,869.41/x
  3. Step 3: Cross multiply
    78,681.55x = 108,576.66 × 42,869.41
  4. Step 4: Simplify right side
    78,681.55x = 4,654,617,353.97
  5. Step 5: Solve for x
    x = 4,654,617,353.97/78,681.55
  6. Step 6: Final answer
    x = 59,157.67

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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.