Home / 138,964.74-191,670.08-87,985.77

Finding the Fourth Proportional to 138,964.74, 191,670.08 and 87,985.77

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Solution

The fourth proportional to 138,964.74, 191,670.08 and 87,985.77 is: 121,356.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,964.74 : 191,670.08 = 87,985.77 : x
  2. Step 2: Convert to fraction form
    138,964.74/191,670.08 = 87,985.77/x
  3. Step 3: Cross multiply
    138,964.74x = 191,670.08 × 87,985.77
  4. Step 4: Simplify right side
    138,964.74x = 16,864,239,134.83
  5. Step 5: Solve for x
    x = 16,864,239,134.83/138,964.74
  6. Step 6: Final answer
    x = 121,356.25

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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.