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Finding the Fourth Proportional to 159,349.90, 219,898.60 and 87,730.46

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Solution

The fourth proportional to 159,349.90, 219,898.60 and 87,730.46 is: 121,065.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,349.90 : 219,898.60 = 87,730.46 : x
  2. Step 2: Convert to fraction form
    159,349.90/219,898.60 = 87,730.46/x
  3. Step 3: Cross multiply
    159,349.90x = 219,898.60 × 87,730.46
  4. Step 4: Simplify right side
    159,349.90x = 19,291,805,331.36
  5. Step 5: Solve for x
    x = 19,291,805,331.36/159,349.90
  6. Step 6: Final answer
    x = 121,065.69

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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.