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Finding the Fourth Proportional to 218,810.80, 328,216.20 and 124,332.40

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Solution

The fourth proportional to 218,810.80, 328,216.20 and 124,332.40 is: 186,498.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,810.80 : 328,216.20 = 124,332.40 : x
  2. Step 2: Convert to fraction form
    218,810.80/328,216.20 = 124,332.40/x
  3. Step 3: Cross multiply
    218,810.80x = 328,216.20 × 124,332.40
  4. Step 4: Simplify right side
    218,810.80x = 40,807,907,864.88
  5. Step 5: Solve for x
    x = 40,807,907,864.88/218,810.80
  6. Step 6: Final answer
    x = 186,498.60

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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.