Home / 261,110,971.60-391,669,188.12-76,881,935.86

Finding the Fourth Proportional to 261,110,971.60, 391,669,188.12 and 76,881,935.86

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Solution

The fourth proportional to 261,110,971.60, 391,669,188.12 and 76,881,935.86 is: 115,323,707.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,110,971.60 : 391,669,188.12 = 76,881,935.86 : x
  2. Step 2: Convert to fraction form
    261,110,971.60/391,669,188.12 = 76,881,935.86/x
  3. Step 3: Cross multiply
    261,110,971.60x = 391,669,188.12 × 76,881,935.86
  4. Step 4: Simplify right side
    261,110,971.60x = 30,112,285,398,400,944
  5. Step 5: Solve for x
    x = 30,112,285,398,400,944/261,110,971.60
  6. Step 6: Final answer
    x = 115,323,707.82

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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.