Home / 153,689.40-212,112.06-90,052.56

Finding the Fourth Proportional to 153,689.40, 212,112.06 and 90,052.56

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Solution

The fourth proportional to 153,689.40, 212,112.06 and 90,052.56 is: 124,284.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,689.40 : 212,112.06 = 90,052.56 : x
  2. Step 2: Convert to fraction form
    153,689.40/212,112.06 = 90,052.56/x
  3. Step 3: Cross multiply
    153,689.40x = 212,112.06 × 90,052.56
  4. Step 4: Simplify right side
    153,689.40x = 19,101,234,009.87
  5. Step 5: Solve for x
    x = 19,101,234,009.87/153,689.40
  6. Step 6: Final answer
    x = 124,284.65

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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.