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Finding the Fourth Proportional to 121,153.60, 181,708.80 and 76,700.80

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Solution

The fourth proportional to 121,153.60, 181,708.80 and 76,700.80 is: 115,037.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,153.60 : 181,708.80 = 76,700.80 : x
  2. Step 2: Convert to fraction form
    121,153.60/181,708.80 = 76,700.80/x
  3. Step 3: Cross multiply
    121,153.60x = 181,708.80 × 76,700.80
  4. Step 4: Simplify right side
    121,153.60x = 13,937,210,327.04
  5. Step 5: Solve for x
    x = 13,937,210,327.04/121,153.60
  6. Step 6: Final answer
    x = 115,037.53

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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.