Home / 128,724,905.20-193,087,357.80-76,992,732.40

Finding the Fourth Proportional to 128,724,905.20, 193,087,357.80 and 76,992,732.40

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Solution

The fourth proportional to 128,724,905.20, 193,087,357.80 and 76,992,732.40 is: 115,489,098.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,724,905.20 : 193,087,357.80 = 76,992,732.40 : x
  2. Step 2: Convert to fraction form
    128,724,905.20/193,087,357.80 = 76,992,732.40/x
  3. Step 3: Cross multiply
    128,724,905.20x = 193,087,357.80 × 76,992,732.40
  4. Step 4: Simplify right side
    128,724,905.20x = 14,866,323,268,918,454
  5. Step 5: Solve for x
    x = 14,866,323,268,918,454/128,724,905.20
  6. Step 6: Final answer
    x = 115,489,098.60

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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.