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Finding the Fourth Proportional to 86,583.80, 129,875.70 and 72,003.80

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Solution

The fourth proportional to 86,583.80, 129,875.70 and 72,003.80 is: 108,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,583.80 : 129,875.70 = 72,003.80 : x
  2. Step 2: Convert to fraction form
    86,583.80/129,875.70 = 72,003.80/x
  3. Step 3: Cross multiply
    86,583.80x = 129,875.70 × 72,003.80
  4. Step 4: Simplify right side
    86,583.80x = 9,351,543,927.66
  5. Step 5: Solve for x
    x = 9,351,543,927.66/86,583.80
  6. Step 6: Final answer
    x = 108,005.70

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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.