Home / 261,028,120.32-391,458,362.88-86,111,838.72

Finding the Fourth Proportional to 261,028,120.32, 391,458,362.88 and 86,111,838.72

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Solution

The fourth proportional to 261,028,120.32, 391,458,362.88 and 86,111,838.72 is: 129,140,107.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,028,120.32 : 391,458,362.88 = 86,111,838.72 : x
  2. Step 2: Convert to fraction form
    261,028,120.32/391,458,362.88 = 86,111,838.72/x
  3. Step 3: Cross multiply
    261,028,120.32x = 391,458,362.88 × 86,111,838.72
  4. Step 4: Simplify right side
    261,028,120.32x = 33,709,199,409,917,792
  5. Step 5: Solve for x
    x = 33,709,199,409,917,792/261,028,120.32
  6. Step 6: Final answer
    x = 129,140,107.08

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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.