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Finding the Fourth Proportional to 210,046.80, 315,117.20 and 76,924.40

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Solution

The fourth proportional to 210,046.80, 315,117.20 and 76,924.40 is: 115,403.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,046.80 : 315,117.20 = 76,924.40 : x
  2. Step 2: Convert to fraction form
    210,046.80/315,117.20 = 76,924.40/x
  3. Step 3: Cross multiply
    210,046.80x = 315,117.20 × 76,924.40
  4. Step 4: Simplify right side
    210,046.80x = 24,240,201,539.68
  5. Step 5: Solve for x
    x = 24,240,201,539.68/210,046.80
  6. Step 6: Final answer
    x = 115,403.81

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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.