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Finding the Fourth Proportional to 139,032.18, 191,862.07 and 78,600.51

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Solution

The fourth proportional to 139,032.18, 191,862.07 and 78,600.51 is: 108,467.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,032.18 : 191,862.07 = 78,600.51 : x
  2. Step 2: Convert to fraction form
    139,032.18/191,862.07 = 78,600.51/x
  3. Step 3: Cross multiply
    139,032.18x = 191,862.07 × 78,600.51
  4. Step 4: Simplify right side
    139,032.18x = 15,080,456,355.15
  5. Step 5: Solve for x
    x = 15,080,456,355.15/139,032.18
  6. Step 6: Final answer
    x = 108,467.38

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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.