Home / 89,929.96-135,048.02-86,168.32

Finding the Fourth Proportional to 89,929.96, 135,048.02 and 86,168.32

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Solution

The fourth proportional to 89,929.96, 135,048.02 and 86,168.32 is: 129,399.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,929.96 : 135,048.02 = 86,168.32 : x
  2. Step 2: Convert to fraction form
    89,929.96/135,048.02 = 86,168.32/x
  3. Step 3: Cross multiply
    89,929.96x = 135,048.02 × 86,168.32
  4. Step 4: Simplify right side
    89,929.96x = 11,636,861,002.73
  5. Step 5: Solve for x
    x = 11,636,861,002.73/89,929.96
  6. Step 6: Final answer
    x = 129,399.16

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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.