Home / 121,490.20-182,235.30-77,312.80

Finding the Fourth Proportional to 121,490.20, 182,235.30 and 77,312.80

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Solution

The fourth proportional to 121,490.20, 182,235.30 and 77,312.80 is: 115,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,490.20 : 182,235.30 = 77,312.80 : x
  2. Step 2: Convert to fraction form
    121,490.20/182,235.30 = 77,312.80/x
  3. Step 3: Cross multiply
    121,490.20x = 182,235.30 × 77,312.80
  4. Step 4: Simplify right side
    121,490.20x = 14,089,121,301.84
  5. Step 5: Solve for x
    x = 14,089,121,301.84/121,490.20
  6. Step 6: Final answer
    x = 115,969.20

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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.