Home / 121,151.10-181,726.65-74,430.30

Finding the Fourth Proportional to 121,151.10, 181,726.65 and 74,430.30

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Solution

The fourth proportional to 121,151.10, 181,726.65 and 74,430.30 is: 111,645.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,151.10 : 181,726.65 = 74,430.30 : x
  2. Step 2: Convert to fraction form
    121,151.10/181,726.65 = 74,430.30/x
  3. Step 3: Cross multiply
    121,151.10x = 181,726.65 × 74,430.30
  4. Step 4: Simplify right side
    121,151.10x = 13,525,969,077.50
  5. Step 5: Solve for x
    x = 13,525,969,077.50/121,151.10
  6. Step 6: Final answer
    x = 111,645.45

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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.