Home / 75,108.64-103,539.52-57,172.40

Finding the Fourth Proportional to 75,108.64, 103,539.52 and 57,172.40

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Solution

The fourth proportional to 75,108.64, 103,539.52 and 57,172.40 is: 78,813.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,108.64 : 103,539.52 = 57,172.40 : x
  2. Step 2: Convert to fraction form
    75,108.64/103,539.52 = 57,172.40/x
  3. Step 3: Cross multiply
    75,108.64x = 103,539.52 × 57,172.40
  4. Step 4: Simplify right side
    75,108.64x = 5,919,602,853.25
  5. Step 5: Solve for x
    x = 5,919,602,853.25/75,108.64
  6. Step 6: Final answer
    x = 78,813.87

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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.