Home / 93,428.20-140,142.30-86,211.10

Finding the Fourth Proportional to 93,428.20, 140,142.30 and 86,211.10

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Solution

The fourth proportional to 93,428.20, 140,142.30 and 86,211.10 is: 129,316.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,428.20 : 140,142.30 = 86,211.10 : x
  2. Step 2: Convert to fraction form
    93,428.20/140,142.30 = 86,211.10/x
  3. Step 3: Cross multiply
    93,428.20x = 140,142.30 × 86,211.10
  4. Step 4: Simplify right side
    93,428.20x = 12,081,821,839.53
  5. Step 5: Solve for x
    x = 12,081,821,839.53/93,428.20
  6. Step 6: Final answer
    x = 129,316.65

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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.