Home / 153,998.04-212,520.78-90,381.72

Finding the Fourth Proportional to 153,998.04, 212,520.78 and 90,381.72

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Solution

The fourth proportional to 153,998.04, 212,520.78 and 90,381.72 is: 124,728.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,998.04 : 212,520.78 = 90,381.72 : x
  2. Step 2: Convert to fraction form
    153,998.04/212,520.78 = 90,381.72/x
  3. Step 3: Cross multiply
    153,998.04x = 212,520.78 × 90,381.72
  4. Step 4: Simplify right side
    153,998.04x = 19,207,993,632.14
  5. Step 5: Solve for x
    x = 19,207,993,632.14/153,998.04
  6. Step 6: Final answer
    x = 124,728.82

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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.