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Finding the Fourth Proportional to 119,084.79, 178,670.81 and 85,842.39

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Solution

The fourth proportional to 119,084.79, 178,670.81 and 85,842.39 is: 128,795.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,084.79 : 178,670.81 = 85,842.39 : x
  2. Step 2: Convert to fraction form
    119,084.79/178,670.81 = 85,842.39/x
  3. Step 3: Cross multiply
    119,084.79x = 178,670.81 × 85,842.39
  4. Step 4: Simplify right side
    119,084.79x = 15,337,528,924.42
  5. Step 5: Solve for x
    x = 15,337,528,924.42/119,084.79
  6. Step 6: Final answer
    x = 128,795.03

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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.