Home / 128,892,972.40-193,339,458.60-77,932,178.80

Finding the Fourth Proportional to 128,892,972.40, 193,339,458.60 and 77,932,178.80

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Solution

The fourth proportional to 128,892,972.40, 193,339,458.60 and 77,932,178.80 is: 116,898,268.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,892,972.40 : 193,339,458.60 = 77,932,178.80 : x
  2. Step 2: Convert to fraction form
    128,892,972.40/193,339,458.60 = 77,932,178.80/x
  3. Step 3: Cross multiply
    128,892,972.40x = 193,339,458.60 × 77,932,178.80
  4. Step 4: Simplify right side
    128,892,972.40x = 15,067,365,256,710,396
  5. Step 5: Solve for x
    x = 15,067,365,256,710,396/128,892,972.40
  6. Step 6: Final answer
    x = 116,898,268.20

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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.