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Finding the Fourth Proportional to 155,675.48, 214,819.98 and 87,689.48

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Solution

The fourth proportional to 155,675.48, 214,819.98 and 87,689.48 is: 121,004.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,675.48 : 214,819.98 = 87,689.48 : x
  2. Step 2: Convert to fraction form
    155,675.48/214,819.98 = 87,689.48/x
  3. Step 3: Cross multiply
    155,675.48x = 214,819.98 × 87,689.48
  4. Step 4: Simplify right side
    155,675.48x = 18,837,452,339.81
  5. Step 5: Solve for x
    x = 18,837,452,339.81/155,675.48
  6. Step 6: Final answer
    x = 121,004.62

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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.