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Finding the Fourth Proportional to 159,172.19, 219,653.30 and 90,274.30

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Solution

The fourth proportional to 159,172.19, 219,653.30 and 90,274.30 is: 124,576.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,172.19 : 219,653.30 = 90,274.30 : x
  2. Step 2: Convert to fraction form
    159,172.19/219,653.30 = 90,274.30/x
  3. Step 3: Cross multiply
    159,172.19x = 219,653.30 × 90,274.30
  4. Step 4: Simplify right side
    159,172.19x = 19,829,047,900.19
  5. Step 5: Solve for x
    x = 19,829,047,900.19/159,172.19
  6. Step 6: Final answer
    x = 124,576.08

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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.