Home / 236,417.12-326,255.20-128,987.28

Finding the Fourth Proportional to 236,417.12, 326,255.20 and 128,987.28

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Solution

The fourth proportional to 236,417.12, 326,255.20 and 128,987.28 is: 178,002.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,417.12 : 326,255.20 = 128,987.28 : x
  2. Step 2: Convert to fraction form
    236,417.12/326,255.20 = 128,987.28/x
  3. Step 3: Cross multiply
    236,417.12x = 326,255.20 × 128,987.28
  4. Step 4: Simplify right side
    236,417.12x = 42,082,770,833.86
  5. Step 5: Solve for x
    x = 42,082,770,833.86/236,417.12
  6. Step 6: Final answer
    x = 178,002.21

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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.