Home / 138,887.19-191,664.63-75,225

Finding the Fourth Proportional to 138,887.19, 191,664.63 and 75,225

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Solution

The fourth proportional to 138,887.19, 191,664.63 and 75,225 is: 103,810.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,887.19 : 191,664.63 = 75,225 : x
  2. Step 2: Convert to fraction form
    138,887.19/191,664.63 = 75,225/x
  3. Step 3: Cross multiply
    138,887.19x = 191,664.63 × 75,225
  4. Step 4: Simplify right side
    138,887.19x = 14,417,971,791.75
  5. Step 5: Solve for x
    x = 14,417,971,791.75/138,887.19
  6. Step 6: Final answer
    x = 103,810.67

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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.