Home / 138,905.10-191,688.36-75,243

Finding the Fourth Proportional to 138,905.10, 191,688.36 and 75,243

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Solution

The fourth proportional to 138,905.10, 191,688.36 and 75,243 is: 103,834.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,905.10 : 191,688.36 = 75,243 : x
  2. Step 2: Convert to fraction form
    138,905.10/191,688.36 = 75,243/x
  3. Step 3: Cross multiply
    138,905.10x = 191,688.36 × 75,243
  4. Step 4: Simplify right side
    138,905.10x = 14,423,207,271.48
  5. Step 5: Solve for x
    x = 14,423,207,271.48/138,905.10
  6. Step 6: Final answer
    x = 103,834.97

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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.