Home / 138,745.48-191,421.86-90,325.24

Finding the Fourth Proportional to 138,745.48, 191,421.86 and 90,325.24

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Solution

The fourth proportional to 138,745.48, 191,421.86 and 90,325.24 is: 124,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,745.48 : 191,421.86 = 90,325.24 : x
  2. Step 2: Convert to fraction form
    138,745.48/191,421.86 = 90,325.24/x
  3. Step 3: Cross multiply
    138,745.48x = 191,421.86 × 90,325.24
  4. Step 4: Simplify right side
    138,745.48x = 17,290,225,445.75
  5. Step 5: Solve for x
    x = 17,290,225,445.75/138,745.48
  6. Step 6: Final answer
    x = 124,618.30

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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.