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Finding the Fourth Proportional to 119,316.81, 178,585.80 and 87,718.51

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Solution

The fourth proportional to 119,316.81, 178,585.80 and 87,718.51 is: 131,291.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,316.81 : 178,585.80 = 87,718.51 : x
  2. Step 2: Convert to fraction form
    119,316.81/178,585.80 = 87,718.51/x
  3. Step 3: Cross multiply
    119,316.81x = 178,585.80 × 87,718.51
  4. Step 4: Simplify right side
    119,316.81x = 15,665,280,177.45
  5. Step 5: Solve for x
    x = 15,665,280,177.45/119,316.81
  6. Step 6: Final answer
    x = 131,291.47

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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.