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Finding the Fourth Proportional to 139,391.45, 192,348.26 and 77,303.93

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Solution

The fourth proportional to 139,391.45, 192,348.26 and 77,303.93 is: 106,672.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,391.45 : 192,348.26 = 77,303.93 : x
  2. Step 2: Convert to fraction form
    139,391.45/192,348.26 = 77,303.93/x
  3. Step 3: Cross multiply
    139,391.45x = 192,348.26 × 77,303.93
  4. Step 4: Simplify right side
    139,391.45x = 14,869,276,521.01
  5. Step 5: Solve for x
    x = 14,869,276,521.01/139,391.45
  6. Step 6: Final answer
    x = 106,672.81

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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.