Home / 121,321.10-181,981.65-74,600.30

Finding the Fourth Proportional to 121,321.10, 181,981.65 and 74,600.30

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Solution

The fourth proportional to 121,321.10, 181,981.65 and 74,600.30 is: 111,900.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,321.10 : 181,981.65 = 74,600.30 : x
  2. Step 2: Convert to fraction form
    121,321.10/181,981.65 = 74,600.30/x
  3. Step 3: Cross multiply
    121,321.10x = 181,981.65 × 74,600.30
  4. Step 4: Simplify right side
    121,321.10x = 13,575,885,684.50
  5. Step 5: Solve for x
    x = 13,575,885,684.50/121,321.10
  6. Step 6: Final answer
    x = 111,900.45

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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.