Home / 102,589.96-141,638.18-78,670.60

Finding the Fourth Proportional to 102,589.96, 141,638.18 and 78,670.60

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Solution

The fourth proportional to 102,589.96, 141,638.18 and 78,670.60 is: 108,614.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,589.96 : 141,638.18 = 78,670.60 : x
  2. Step 2: Convert to fraction form
    102,589.96/141,638.18 = 78,670.60/x
  3. Step 3: Cross multiply
    102,589.96x = 141,638.18 × 78,670.60
  4. Step 4: Simplify right side
    102,589.96x = 11,142,760,603.51
  5. Step 5: Solve for x
    x = 11,142,760,603.51/102,589.96
  6. Step 6: Final answer
    x = 108,614.53

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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.