Home / 81,071,071.45-121,727,952.86-70,175,054.72

Finding the Fourth Proportional to 81,071,071.45, 121,727,952.86 and 70,175,054.72

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Solution

The fourth proportional to 81,071,071.45, 121,727,952.86 and 70,175,054.72 is: 105,367,618.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,071,071.45 : 121,727,952.86 = 70,175,054.72 : x
  2. Step 2: Convert to fraction form
    81,071,071.45/121,727,952.86 = 70,175,054.72/x
  3. Step 3: Cross multiply
    81,071,071.45x = 121,727,952.86 × 70,175,054.72
  4. Step 4: Simplify right side
    81,071,071.45x = 8,542,265,753,383,837
  5. Step 5: Solve for x
    x = 8,542,265,753,383,837/81,071,071.45
  6. Step 6: Final answer
    x = 105,367,618.82

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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.