Home / 168,439.36-232,440.48-100,421.28

Finding the Fourth Proportional to 168,439.36, 232,440.48 and 100,421.28

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Solution

The fourth proportional to 168,439.36, 232,440.48 and 100,421.28 is: 138,577.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,439.36 : 232,440.48 = 100,421.28 : x
  2. Step 2: Convert to fraction form
    168,439.36/232,440.48 = 100,421.28/x
  3. Step 3: Cross multiply
    168,439.36x = 232,440.48 × 100,421.28
  4. Step 4: Simplify right side
    168,439.36x = 23,341,970,525.41
  5. Step 5: Solve for x
    x = 23,341,970,525.41/168,439.36
  6. Step 6: Final answer
    x = 138,577.89

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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.