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Finding the Fourth Proportional to 106,398.72, 146,818.56 and 61,678.08

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Solution

The fourth proportional to 106,398.72, 146,818.56 and 61,678.08 is: 85,108.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,398.72 : 146,818.56 = 61,678.08 : x
  2. Step 2: Convert to fraction form
    106,398.72/146,818.56 = 61,678.08/x
  3. Step 3: Cross multiply
    106,398.72x = 146,818.56 × 61,678.08
  4. Step 4: Simplify right side
    106,398.72x = 9,055,486,889.16
  5. Step 5: Solve for x
    x = 9,055,486,889.16/106,398.72
  6. Step 6: Final answer
    x = 85,108.98

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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.