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Finding the Fourth Proportional to 112,571.60, 155,481 and 89,988.80

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Solution

The fourth proportional to 112,571.60, 155,481 and 89,988.80 is: 124,290.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,571.60 : 155,481 = 89,988.80 : x
  2. Step 2: Convert to fraction form
    112,571.60/155,481 = 89,988.80/x
  3. Step 3: Cross multiply
    112,571.60x = 155,481 × 89,988.80
  4. Step 4: Simplify right side
    112,571.60x = 13,991,548,612.80
  5. Step 5: Solve for x
    x = 13,991,548,612.80/112,571.60
  6. Step 6: Final answer
    x = 124,290.22

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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.