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Finding the Fourth Proportional to 139,416.75, 209,007.54 and 60,471.51

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Solution

The fourth proportional to 139,416.75, 209,007.54 and 60,471.51 is: 90,656.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,416.75 : 209,007.54 = 60,471.51 : x
  2. Step 2: Convert to fraction form
    139,416.75/209,007.54 = 60,471.51/x
  3. Step 3: Cross multiply
    139,416.75x = 209,007.54 × 60,471.51
  4. Step 4: Simplify right side
    139,416.75x = 12,639,001,545.19
  5. Step 5: Solve for x
    x = 12,639,001,545.19/139,416.75
  6. Step 6: Final answer
    x = 90,656.26

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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.