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Finding the Fourth Proportional to 139,761.48, 192,868.32 and 76,098.24

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Solution

The fourth proportional to 139,761.48, 192,868.32 and 76,098.24 is: 105,014.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,761.48 : 192,868.32 = 76,098.24 : x
  2. Step 2: Convert to fraction form
    139,761.48/192,868.32 = 76,098.24/x
  3. Step 3: Cross multiply
    139,761.48x = 192,868.32 × 76,098.24
  4. Step 4: Simplify right side
    139,761.48x = 14,676,939,703.76
  5. Step 5: Solve for x
    x = 14,676,939,703.76/139,761.48
  6. Step 6: Final answer
    x = 105,014.20

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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.