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Finding the Fourth Proportional to 56,689.51, 85,022.88 and 53,879.35

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Solution

The fourth proportional to 56,689.51, 85,022.88 and 53,879.35 is: 80,808.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,689.51 : 85,022.88 = 53,879.35 : x
  2. Step 2: Convert to fraction form
    56,689.51/85,022.88 = 53,879.35/x
  3. Step 3: Cross multiply
    56,689.51x = 85,022.88 × 53,879.35
  4. Step 4: Simplify right side
    56,689.51x = 4,580,977,509.53
  5. Step 5: Solve for x
    x = 4,580,977,509.53/56,689.51
  6. Step 6: Final answer
    x = 80,808.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.