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Finding the Fourth Proportional to 86,535.65, 129,803.48 and 36,602.80

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Solution

The fourth proportional to 86,535.65, 129,803.48 and 36,602.80 is: 54,904.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,535.65 : 129,803.48 = 36,602.80 : x
  2. Step 2: Convert to fraction form
    86,535.65/129,803.48 = 36,602.80/x
  3. Step 3: Cross multiply
    86,535.65x = 129,803.48 × 36,602.80
  4. Step 4: Simplify right side
    86,535.65x = 4,751,170,817.74
  5. Step 5: Solve for x
    x = 4,751,170,817.74/86,535.65
  6. Step 6: Final answer
    x = 54,904.20

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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.