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Finding the Fourth Proportional to 85,779.78, 118,410.81 and 55,591.02

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Solution

The fourth proportional to 85,779.78, 118,410.81 and 55,591.02 is: 76,738.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,779.78 : 118,410.81 = 55,591.02 : x
  2. Step 2: Convert to fraction form
    85,779.78/118,410.81 = 55,591.02/x
  3. Step 3: Cross multiply
    85,779.78x = 118,410.81 × 55,591.02
  4. Step 4: Simplify right side
    85,779.78x = 6,582,577,706.93
  5. Step 5: Solve for x
    x = 6,582,577,706.93/85,779.78
  6. Step 6: Final answer
    x = 76,738.10

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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.