Home / 86,432.15-129,697.43-69,012.70

Finding the Fourth Proportional to 86,432.15, 129,697.43 and 69,012.70

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Solution

The fourth proportional to 86,432.15, 129,697.43 and 69,012.70 is: 103,558.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,432.15 : 129,697.43 = 69,012.70 : x
  2. Step 2: Convert to fraction form
    86,432.15/129,697.43 = 69,012.70/x
  3. Step 3: Cross multiply
    86,432.15x = 129,697.43 × 69,012.70
  4. Step 4: Simplify right side
    86,432.15x = 8,950,769,827.36
  5. Step 5: Solve for x
    x = 8,950,769,827.36/86,432.15
  6. Step 6: Final answer
    x = 103,558.34

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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.