Home / 138,608.19-191,308.95-87,588.45

Finding the Fourth Proportional to 138,608.19, 191,308.95 and 87,588.45

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Solution

The fourth proportional to 138,608.19, 191,308.95 and 87,588.45 is: 120,890.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608.19 : 191,308.95 = 87,588.45 : x
  2. Step 2: Convert to fraction form
    138,608.19/191,308.95 = 87,588.45/x
  3. Step 3: Cross multiply
    138,608.19x = 191,308.95 × 87,588.45
  4. Step 4: Simplify right side
    138,608.19x = 16,756,454,401.63
  5. Step 5: Solve for x
    x = 16,756,454,401.63/138,608.19
  6. Step 6: Final answer
    x = 120,890.80

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1.5x scale

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.