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Finding the Fourth Proportional to 112,540.80, 155,313.60 and 64,809.60

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Solution

The fourth proportional to 112,540.80, 155,313.60 and 64,809.60 is: 89,441.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,540.80 : 155,313.60 = 64,809.60 : x
  2. Step 2: Convert to fraction form
    112,540.80/155,313.60 = 64,809.60/x
  3. Step 3: Cross multiply
    112,540.80x = 155,313.60 × 64,809.60
  4. Step 4: Simplify right side
    112,540.80x = 10,065,812,290.56
  5. Step 5: Solve for x
    x = 10,065,812,290.56/112,540.80
  6. Step 6: Final answer
    x = 89,441.45

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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.