Home / 138,539.09-191,056.39-87,463.07

Finding the Fourth Proportional to 138,539.09, 191,056.39 and 87,463.07

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Solution

The fourth proportional to 138,539.09, 191,056.39 and 87,463.07 is: 120,618.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,539.09 : 191,056.39 = 87,463.07 : x
  2. Step 2: Convert to fraction form
    138,539.09/191,056.39 = 87,463.07/x
  3. Step 3: Cross multiply
    138,539.09x = 191,056.39 × 87,463.07
  4. Step 4: Simplify right side
    138,539.09x = 16,710,378,671.50
  5. Step 5: Solve for x
    x = 16,710,378,671.50/138,539.09
  6. Step 6: Final answer
    x = 120,618.51

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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.