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Finding the Fourth Proportional to 86,554, 119,445.06 and 53,020

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Solution

The fourth proportional to 86,554, 119,445.06 and 53,020 is: 73,167.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,554 : 119,445.06 = 53,020 : x
  2. Step 2: Convert to fraction form
    86,554/119,445.06 = 53,020/x
  3. Step 3: Cross multiply
    86,554x = 119,445.06 × 53,020
  4. Step 4: Simplify right side
    86,554x = 6,332,977,081.20
  5. Step 5: Solve for x
    x = 6,332,977,081.20/86,554
  6. Step 6: Final answer
    x = 73,167.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.