Home / 128,726,530.80-193,089,796.20-74,306,972.40

Finding the Fourth Proportional to 128,726,530.80, 193,089,796.20 and 74,306,972.40

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Solution

The fourth proportional to 128,726,530.80, 193,089,796.20 and 74,306,972.40 is: 111,460,458.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,726,530.80 : 193,089,796.20 = 74,306,972.40 : x
  2. Step 2: Convert to fraction form
    128,726,530.80/193,089,796.20 = 74,306,972.40/x
  3. Step 3: Cross multiply
    128,726,530.80x = 193,089,796.20 × 74,306,972.40
  4. Step 4: Simplify right side
    128,726,530.80x = 14,347,918,156,955,026
  5. Step 5: Solve for x
    x = 14,347,918,156,955,026/128,726,530.80
  6. Step 6: Final answer
    x = 111,460,458.60

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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.