Home / 90,936.72-136,426.48-28,607.20

Finding the Fourth Proportional to 90,936.72, 136,426.48 and 28,607.20

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Solution

The fourth proportional to 90,936.72, 136,426.48 and 28,607.20 is: 42,917.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,936.72 : 136,426.48 = 28,607.20 : x
  2. Step 2: Convert to fraction form
    90,936.72/136,426.48 = 28,607.20/x
  3. Step 3: Cross multiply
    90,936.72x = 136,426.48 × 28,607.20
  4. Step 4: Simplify right side
    90,936.72x = 3,902,779,598.66
  5. Step 5: Solve for x
    x = 3,902,779,598.66/90,936.72
  6. Step 6: Final answer
    x = 42,917.53

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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.