Home / 218,684.32-328,045.92-85,574.40

Finding the Fourth Proportional to 218,684.32, 328,045.92 and 85,574.40

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Solution

The fourth proportional to 218,684.32, 328,045.92 and 85,574.40 is: 128,369.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,684.32 : 328,045.92 = 85,574.40 : x
  2. Step 2: Convert to fraction form
    218,684.32/328,045.92 = 85,574.40/x
  3. Step 3: Cross multiply
    218,684.32x = 328,045.92 × 85,574.40
  4. Step 4: Simplify right side
    218,684.32x = 28,072,332,776.45
  5. Step 5: Solve for x
    x = 28,072,332,776.45/218,684.32
  6. Step 6: Final answer
    x = 128,369.21

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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.