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Finding the Fourth Proportional to 127,688.67, 191,399.91 and 71,446.32

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Solution

The fourth proportional to 127,688.67, 191,399.91 and 71,446.32 is: 107,095.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,688.67 : 191,399.91 = 71,446.32 : x
  2. Step 2: Convert to fraction form
    127,688.67/191,399.91 = 71,446.32/x
  3. Step 3: Cross multiply
    127,688.67x = 191,399.91 × 71,446.32
  4. Step 4: Simplify right side
    127,688.67x = 13,674,819,217.83
  5. Step 5: Solve for x
    x = 13,674,819,217.83/127,688.67
  6. Step 6: Final answer
    x = 107,095.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.