Home / 218,637.40-328,032.90-78,400.60

Finding the Fourth Proportional to 218,637.40, 328,032.90 and 78,400.60

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Solution

The fourth proportional to 218,637.40, 328,032.90 and 78,400.60 is: 117,628.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,637.40 : 328,032.90 = 78,400.60 : x
  2. Step 2: Convert to fraction form
    218,637.40/328,032.90 = 78,400.60/x
  3. Step 3: Cross multiply
    218,637.40x = 328,032.90 × 78,400.60
  4. Step 4: Simplify right side
    218,637.40x = 25,717,976,179.74
  5. Step 5: Solve for x
    x = 25,717,976,179.74/218,637.40
  6. Step 6: Final answer
    x = 117,628.44

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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.