Home / 102,878.40-141,985.26-57,558.90

Finding the Fourth Proportional to 102,878.40, 141,985.26 and 57,558.90

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Solution

The fourth proportional to 102,878.40, 141,985.26 and 57,558.90 is: 79,438.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,878.40 : 141,985.26 = 57,558.90 : x
  2. Step 2: Convert to fraction form
    102,878.40/141,985.26 = 57,558.90/x
  3. Step 3: Cross multiply
    102,878.40x = 141,985.26 × 57,558.90
  4. Step 4: Simplify right side
    102,878.40x = 8,172,515,381.81
  5. Step 5: Solve for x
    x = 8,172,515,381.81/102,878.40
  6. Step 6: Final answer
    x = 79,438.59

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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.