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Finding the Fourth Proportional to 216,908.90, 325,363.35 and 128,116.70

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Solution

The fourth proportional to 216,908.90, 325,363.35 and 128,116.70 is: 192,175.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,908.90 : 325,363.35 = 128,116.70 : x
  2. Step 2: Convert to fraction form
    216,908.90/325,363.35 = 128,116.70/x
  3. Step 3: Cross multiply
    216,908.90x = 325,363.35 × 128,116.70
  4. Step 4: Simplify right side
    216,908.90x = 41,684,478,702.95
  5. Step 5: Solve for x
    x = 41,684,478,702.95/216,908.90
  6. Step 6: Final answer
    x = 192,175.05

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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.