Home / 153,995.04-212,516.64-90,378.72

Finding the Fourth Proportional to 153,995.04, 212,516.64 and 90,378.72

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Solution

The fourth proportional to 153,995.04, 212,516.64 and 90,378.72 is: 124,724.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,995.04 : 212,516.64 = 90,378.72 : x
  2. Step 2: Convert to fraction form
    153,995.04/212,516.64 = 90,378.72/x
  3. Step 3: Cross multiply
    153,995.04x = 212,516.64 × 90,378.72
  4. Step 4: Simplify right side
    153,995.04x = 19,206,981,901.90
  5. Step 5: Solve for x
    x = 19,206,981,901.90/153,995.04
  6. Step 6: Final answer
    x = 124,724.68

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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.