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Finding the Fourth Proportional to 145,853.70, 218,780.55 and 123,983.70

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Solution

The fourth proportional to 145,853.70, 218,780.55 and 123,983.70 is: 185,975.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,853.70 : 218,780.55 = 123,983.70 : x
  2. Step 2: Convert to fraction form
    145,853.70/218,780.55 = 123,983.70/x
  3. Step 3: Cross multiply
    145,853.70x = 218,780.55 × 123,983.70
  4. Step 4: Simplify right side
    145,853.70x = 27,125,222,077.04
  5. Step 5: Solve for x
    x = 27,125,222,077.04/145,853.70
  6. Step 6: Final answer
    x = 185,975.55

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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.