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Finding the Fourth Proportional to 139,652.61, 192,718.04 and 77,560.94

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Solution

The fourth proportional to 139,652.61, 192,718.04 and 77,560.94 is: 107,032.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,652.61 : 192,718.04 = 77,560.94 : x
  2. Step 2: Convert to fraction form
    139,652.61/192,718.04 = 77,560.94/x
  3. Step 3: Cross multiply
    139,652.61x = 192,718.04 × 77,560.94
  4. Step 4: Simplify right side
    139,652.61x = 14,947,392,431.35
  5. Step 5: Solve for x
    x = 14,947,392,431.35/139,652.61
  6. Step 6: Final answer
    x = 107,032.68

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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.