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Finding the Fourth Proportional to 153,780.88, 212,183.40 and 90,114.88

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Solution

The fourth proportional to 153,780.88, 212,183.40 and 90,114.88 is: 124,338.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,780.88 : 212,183.40 = 90,114.88 : x
  2. Step 2: Convert to fraction form
    153,780.88/212,183.40 = 90,114.88/x
  3. Step 3: Cross multiply
    153,780.88x = 212,183.40 × 90,114.88
  4. Step 4: Simplify right side
    153,780.88x = 19,120,881,628.99
  5. Step 5: Solve for x
    x = 19,120,881,628.99/153,780.88
  6. Step 6: Final answer
    x = 124,338.48

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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.