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Finding the Fourth Proportional to 250,160, 345,220.80 and 136,986.88

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Solution

The fourth proportional to 250,160, 345,220.80 and 136,986.88 is: 189,041.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,160 : 345,220.80 = 136,986.88 : x
  2. Step 2: Convert to fraction form
    250,160/345,220.80 = 136,986.88/x
  3. Step 3: Cross multiply
    250,160x = 345,220.80 × 136,986.88
  4. Step 4: Simplify right side
    250,160x = 47,290,720,303.10
  5. Step 5: Solve for x
    x = 47,290,720,303.10/250,160
  6. Step 6: Final answer
    x = 189,041.89

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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.