Home / 121,173.06-181,746.60-42,288.78

Finding the Fourth Proportional to 121,173.06, 181,746.60 and 42,288.78

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Solution

The fourth proportional to 121,173.06, 181,746.60 and 42,288.78 is: 63,428.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,173.06 : 181,746.60 = 42,288.78 : x
  2. Step 2: Convert to fraction form
    121,173.06/181,746.60 = 42,288.78/x
  3. Step 3: Cross multiply
    121,173.06x = 181,746.60 × 42,288.78
  4. Step 4: Simplify right side
    121,173.06x = 7,685,841,983.15
  5. Step 5: Solve for x
    x = 7,685,841,983.15/121,173.06
  6. Step 6: Final answer
    x = 63,428.64

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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.