Home / 121,343,998.40-182,015,997.60-78,345,828.80

Finding the Fourth Proportional to 121,343,998.40, 182,015,997.60 and 78,345,828.80

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Solution

The fourth proportional to 121,343,998.40, 182,015,997.60 and 78,345,828.80 is: 117,518,743.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,343,998.40 : 182,015,997.60 = 78,345,828.80 : x
  2. Step 2: Convert to fraction form
    121,343,998.40/182,015,997.60 = 78,345,828.80/x
  3. Step 3: Cross multiply
    121,343,998.40x = 182,015,997.60 × 78,345,828.80
  4. Step 4: Simplify right side
    121,343,998.40x = 14,260,194,186,830,810
  5. Step 5: Solve for x
    x = 14,260,194,186,830,810/121,343,998.40
  6. Step 6: Final answer
    x = 117,518,743.20

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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.