Home / 128,781,723.20-193,396,533.60-68,315,547.20

Finding the Fourth Proportional to 128,781,723.20, 193,396,533.60 and 68,315,547.20

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Solution

The fourth proportional to 128,781,723.20, 193,396,533.60 and 68,315,547.20 is: 102,592,120.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,781,723.20 : 193,396,533.60 = 68,315,547.20 : x
  2. Step 2: Convert to fraction form
    128,781,723.20/193,396,533.60 = 68,315,547.20/x
  3. Step 3: Cross multiply
    128,781,723.20x = 193,396,533.60 × 68,315,547.20
  4. Step 4: Simplify right side
    128,781,723.20x = 13,211,990,019,467,186
  5. Step 5: Solve for x
    x = 13,211,990,019,467,186/128,781,723.20
  6. Step 6: Final answer
    x = 102,592,120.15

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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.