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Finding the Fourth Proportional to 218,689.14, 328,061.49 and 85,552.32

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Solution

The fourth proportional to 218,689.14, 328,061.49 and 85,552.32 is: 128,339.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,689.14 : 328,061.49 = 85,552.32 : x
  2. Step 2: Convert to fraction form
    218,689.14/328,061.49 = 85,552.32/x
  3. Step 3: Cross multiply
    218,689.14x = 328,061.49 × 85,552.32
  4. Step 4: Simplify right side
    218,689.14x = 28,066,421,572.16
  5. Step 5: Solve for x
    x = 28,066,421,572.16/218,689.14
  6. Step 6: Final answer
    x = 128,339.35

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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.