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Finding the Fourth Proportional to 133,877.54, 184,718.40 and 77,288.78

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Solution

The fourth proportional to 133,877.54, 184,718.40 and 77,288.78 is: 106,639.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,877.54 : 184,718.40 = 77,288.78 : x
  2. Step 2: Convert to fraction form
    133,877.54/184,718.40 = 77,288.78/x
  3. Step 3: Cross multiply
    133,877.54x = 184,718.40 × 77,288.78
  4. Step 4: Simplify right side
    133,877.54x = 14,276,659,779.55
  5. Step 5: Solve for x
    x = 14,276,659,779.55/133,877.54
  6. Step 6: Final answer
    x = 106,639.69

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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.