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Finding the Fourth Proportional to 145,879.70, 218,819.55 and 83,498.90

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Solution

The fourth proportional to 145,879.70, 218,819.55 and 83,498.90 is: 125,248.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,879.70 : 218,819.55 = 83,498.90 : x
  2. Step 2: Convert to fraction form
    145,879.70/218,819.55 = 83,498.90/x
  3. Step 3: Cross multiply
    145,879.70x = 218,819.55 × 83,498.90
  4. Step 4: Simplify right side
    145,879.70x = 18,271,191,723.50
  5. Step 5: Solve for x
    x = 18,271,191,723.50/145,879.70
  6. Step 6: Final answer
    x = 125,248.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.