Home / 138,929.55-191,652.31-87,856.21

Finding the Fourth Proportional to 138,929.55, 191,652.31 and 87,856.21

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Solution

The fourth proportional to 138,929.55, 191,652.31 and 87,856.21 is: 121,197.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,929.55 : 191,652.31 = 87,856.21 : x
  2. Step 2: Convert to fraction form
    138,929.55/191,652.31 = 87,856.21/x
  3. Step 3: Cross multiply
    138,929.55x = 191,652.31 × 87,856.21
  4. Step 4: Simplify right side
    138,929.55x = 16,837,845,594.35
  5. Step 5: Solve for x
    x = 16,837,845,594.35/138,929.55
  6. Step 6: Final answer
    x = 121,197.01

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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.