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Finding the Fourth Proportional to 139,303.74, 192,239.94 and 75,641.55

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Solution

The fourth proportional to 139,303.74, 192,239.94 and 75,641.55 is: 104,385.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,303.74 : 192,239.94 = 75,641.55 : x
  2. Step 2: Convert to fraction form
    139,303.74/192,239.94 = 75,641.55/x
  3. Step 3: Cross multiply
    139,303.74x = 192,239.94 × 75,641.55
  4. Step 4: Simplify right side
    139,303.74x = 14,541,327,033.51
  5. Step 5: Solve for x
    x = 14,541,327,033.51/139,303.74
  6. Step 6: Final answer
    x = 104,385.77

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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.