Home / 121,212.40-181,818.60-76,889.20

Finding the Fourth Proportional to 121,212.40, 181,818.60 and 76,889.20

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Solution

The fourth proportional to 121,212.40, 181,818.60 and 76,889.20 is: 115,333.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,212.40 : 181,818.60 = 76,889.20 : x
  2. Step 2: Convert to fraction form
    121,212.40/181,818.60 = 76,889.20/x
  3. Step 3: Cross multiply
    121,212.40x = 181,818.60 × 76,889.20
  4. Step 4: Simplify right side
    121,212.40x = 13,979,886,699.12
  5. Step 5: Solve for x
    x = 13,979,886,699.12/121,212.40
  6. Step 6: Final answer
    x = 115,333.80

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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.