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Finding the Fourth Proportional to 159,289.69, 219,818.10 and 87,668.17

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Solution

The fourth proportional to 159,289.69, 219,818.10 and 87,668.17 is: 120,981.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,289.69 : 219,818.10 = 87,668.17 : x
  2. Step 2: Convert to fraction form
    159,289.69/219,818.10 = 87,668.17/x
  3. Step 3: Cross multiply
    159,289.69x = 219,818.10 × 87,668.17
  4. Step 4: Simplify right side
    159,289.69x = 19,271,051,575.56
  5. Step 5: Solve for x
    x = 19,271,051,575.56/159,289.69
  6. Step 6: Final answer
    x = 120,981.16

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1.5x scale

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.