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Finding the Fourth Proportional to 154,612.80, 213,355.62 and 90,938.30

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Solution

The fourth proportional to 154,612.80, 213,355.62 and 90,938.30 is: 125,488.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,612.80 : 213,355.62 = 90,938.30 : x
  2. Step 2: Convert to fraction form
    154,612.80/213,355.62 = 90,938.30/x
  3. Step 3: Cross multiply
    154,612.80x = 213,355.62 × 90,938.30
  4. Step 4: Simplify right side
    154,612.80x = 19,402,196,311.47
  5. Step 5: Solve for x
    x = 19,402,196,311.47/154,612.80
  6. Step 6: Final answer
    x = 125,488.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.