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Finding the Fourth Proportional to 153,797.70, 212,200.74 and 90,101.28

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Solution

The fourth proportional to 153,797.70, 212,200.74 and 90,101.28 is: 124,316.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,797.70 : 212,200.74 = 90,101.28 : x
  2. Step 2: Convert to fraction form
    153,797.70/212,200.74 = 90,101.28/x
  3. Step 3: Cross multiply
    153,797.70x = 212,200.74 × 90,101.28
  4. Step 4: Simplify right side
    153,797.70x = 19,119,558,290.95
  5. Step 5: Solve for x
    x = 19,119,558,290.95/153,797.70
  6. Step 6: Final answer
    x = 124,316.28

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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.