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Finding the Fourth Proportional to 139,484.16, 192,486.78 and 75,818.16

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Solution

The fourth proportional to 139,484.16, 192,486.78 and 75,818.16 is: 104,628.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,484.16 : 192,486.78 = 75,818.16 : x
  2. Step 2: Convert to fraction form
    139,484.16/192,486.78 = 75,818.16/x
  3. Step 3: Cross multiply
    139,484.16x = 192,486.78 × 75,818.16
  4. Step 4: Simplify right side
    139,484.16x = 14,593,993,483.92
  5. Step 5: Solve for x
    x = 14,593,993,483.92/139,484.16
  6. Step 6: Final answer
    x = 104,628.32

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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.