Home / 86,621.80-129,981.30-36,693.40

Finding the Fourth Proportional to 86,621.80, 129,981.30 and 36,693.40

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Solution

The fourth proportional to 86,621.80, 129,981.30 and 36,693.40 is: 55,060.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,621.80 : 129,981.30 = 36,693.40 : x
  2. Step 2: Convert to fraction form
    86,621.80/129,981.30 = 36,693.40/x
  3. Step 3: Cross multiply
    86,621.80x = 129,981.30 × 36,693.40
  4. Step 4: Simplify right side
    86,621.80x = 4,769,455,833.42
  5. Step 5: Solve for x
    x = 4,769,455,833.42/86,621.80
  6. Step 6: Final answer
    x = 55,060.69

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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.