Home / 86,583.40-129,875.10-72,805.30

Finding the Fourth Proportional to 86,583.40, 129,875.10 and 72,805.30

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Solution

The fourth proportional to 86,583.40, 129,875.10 and 72,805.30 is: 109,207.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,583.40 : 129,875.10 = 72,805.30 : x
  2. Step 2: Convert to fraction form
    86,583.40/129,875.10 = 72,805.30/x
  3. Step 3: Cross multiply
    86,583.40x = 129,875.10 × 72,805.30
  4. Step 4: Simplify right side
    86,583.40x = 9,455,595,618.03
  5. Step 5: Solve for x
    x = 9,455,595,618.03/86,583.40
  6. Step 6: Final answer
    x = 109,207.95

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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.