Home / 91,711.40-137,567.10-65,139.35

Finding the Fourth Proportional to 91,711.40, 137,567.10 and 65,139.35

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Solution

The fourth proportional to 91,711.40, 137,567.10 and 65,139.35 is: 97,709.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,711.40 : 137,567.10 = 65,139.35 : x
  2. Step 2: Convert to fraction form
    91,711.40/137,567.10 = 65,139.35/x
  3. Step 3: Cross multiply
    91,711.40x = 137,567.10 × 65,139.35
  4. Step 4: Simplify right side
    91,711.40x = 8,961,031,475.39
  5. Step 5: Solve for x
    x = 8,961,031,475.39/91,711.40
  6. Step 6: Final answer
    x = 97,709.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.