Home / 153,690.24-212,089.92-86,622.72

Finding the Fourth Proportional to 153,690.24, 212,089.92 and 86,622.72

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Solution

The fourth proportional to 153,690.24, 212,089.92 and 86,622.72 is: 119,537.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,690.24 : 212,089.92 = 86,622.72 : x
  2. Step 2: Convert to fraction form
    153,690.24/212,089.92 = 86,622.72/x
  3. Step 3: Cross multiply
    153,690.24x = 212,089.92 × 86,622.72
  4. Step 4: Simplify right side
    153,690.24x = 18,371,805,754.98
  5. Step 5: Solve for x
    x = 18,371,805,754.98/153,690.24
  6. Step 6: Final answer
    x = 119,537.88

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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.