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Finding the Fourth Proportional to 159,390.40, 219,950.16 and 91,410.24

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Solution

The fourth proportional to 159,390.40, 219,950.16 and 91,410.24 is: 126,141.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,390.40 : 219,950.16 = 91,410.24 : x
  2. Step 2: Convert to fraction form
    159,390.40/219,950.16 = 91,410.24/x
  3. Step 3: Cross multiply
    159,390.40x = 219,950.16 × 91,410.24
  4. Step 4: Simplify right side
    159,390.40x = 20,105,696,913.64
  5. Step 5: Solve for x
    x = 20,105,696,913.64/159,390.40
  6. Step 6: Final answer
    x = 126,141.20

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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.