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Finding the Fourth Proportional to 158,712.58, 219,023.24 and 90,731.04

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Solution

The fourth proportional to 158,712.58, 219,023.24 and 90,731.04 is: 125,208.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,712.58 : 219,023.24 = 90,731.04 : x
  2. Step 2: Convert to fraction form
    158,712.58/219,023.24 = 90,731.04/x
  3. Step 3: Cross multiply
    158,712.58x = 219,023.24 × 90,731.04
  4. Step 4: Simplify right side
    158,712.58x = 19,872,206,349.37
  5. Step 5: Solve for x
    x = 19,872,206,349.37/158,712.58
  6. Step 6: Final answer
    x = 125,208.77

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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.