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Finding the Fourth Proportional to 120,862.40, 181,293.60 and 61,813.40

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Solution

The fourth proportional to 120,862.40, 181,293.60 and 61,813.40 is: 92,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,862.40 : 181,293.60 = 61,813.40 : x
  2. Step 2: Convert to fraction form
    120,862.40/181,293.60 = 61,813.40/x
  3. Step 3: Cross multiply
    120,862.40x = 181,293.60 × 61,813.40
  4. Step 4: Simplify right side
    120,862.40x = 11,206,373,814.24
  5. Step 5: Solve for x
    x = 11,206,373,814.24/120,862.40
  6. Step 6: Final answer
    x = 92,720.10

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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.