Home / 102,840.96-141,920.12-57,518.76

Finding the Fourth Proportional to 102,840.96, 141,920.12 and 57,518.76

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Solution

The fourth proportional to 102,840.96, 141,920.12 and 57,518.76 is: 79,375.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,840.96 : 141,920.12 = 57,518.76 : x
  2. Step 2: Convert to fraction form
    102,840.96/141,920.12 = 57,518.76/x
  3. Step 3: Cross multiply
    102,840.96x = 141,920.12 × 57,518.76
  4. Step 4: Simplify right side
    102,840.96x = 8,163,069,033.86
  5. Step 5: Solve for x
    x = 8,163,069,033.86/102,840.96
  6. Step 6: Final answer
    x = 79,375.66

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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.