Home / 90,749.32-135,985.38-38,130.04

Finding the Fourth Proportional to 90,749.32, 135,985.38 and 38,130.04

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Solution

The fourth proportional to 90,749.32, 135,985.38 and 38,130.04 is: 57,136.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,749.32 : 135,985.38 = 38,130.04 : x
  2. Step 2: Convert to fraction form
    90,749.32/135,985.38 = 38,130.04/x
  3. Step 3: Cross multiply
    90,749.32x = 135,985.38 × 38,130.04
  4. Step 4: Simplify right side
    90,749.32x = 5,185,127,978.82
  5. Step 5: Solve for x
    x = 5,185,127,978.82/90,749.32
  6. Step 6: Final answer
    x = 57,136.82

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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.