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Finding the Fourth Proportional to 56,995.86, 85,419.27 and 30,643.86

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Solution

The fourth proportional to 56,995.86, 85,419.27 and 30,643.86 is: 45,925.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,995.86 : 85,419.27 = 30,643.86 : x
  2. Step 2: Convert to fraction form
    56,995.86/85,419.27 = 30,643.86/x
  3. Step 3: Cross multiply
    56,995.86x = 85,419.27 × 30,643.86
  4. Step 4: Simplify right side
    56,995.86x = 2,617,576,151.18
  5. Step 5: Solve for x
    x = 2,617,576,151.18/56,995.86
  6. Step 6: Final answer
    x = 45,925.72

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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.