Home / 138,903,221.12-191,689,964.80-76,181,816.32

Finding the Fourth Proportional to 138,903,221.12, 191,689,964.80 and 76,181,816.32

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Solution

The fourth proportional to 138,903,221.12, 191,689,964.80 and 76,181,816.32 is: 105,132,836.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,903,221.12 : 191,689,964.80 = 76,181,816.32 : x
  2. Step 2: Convert to fraction form
    138,903,221.12/191,689,964.80 = 76,181,816.32/x
  3. Step 3: Cross multiply
    138,903,221.12x = 191,689,964.80 × 76,181,816.32
  4. Step 4: Simplify right side
    138,903,221.12x = 14,603,289,688,780,866
  5. Step 5: Solve for x
    x = 14,603,289,688,780,866/138,903,221.12
  6. Step 6: Final answer
    x = 105,132,836.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.