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Finding the Fourth Proportional to 86,315.64, 129,374.64 and 36,320.82

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Solution

The fourth proportional to 86,315.64, 129,374.64 and 36,320.82 is: 54,439.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,315.64 : 129,374.64 = 36,320.82 : x
  2. Step 2: Convert to fraction form
    86,315.64/129,374.64 = 36,320.82/x
  3. Step 3: Cross multiply
    86,315.64x = 129,374.64 × 36,320.82
  4. Step 4: Simplify right side
    86,315.64x = 4,698,993,012.00
  5. Step 5: Solve for x
    x = 4,698,993,012.00/86,315.64
  6. Step 6: Final answer
    x = 54,439.65

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1.5x scale

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.