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Finding the Fourth Proportional to 158,601.32, 218,868.80 and 90,639.08

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Solution

The fourth proportional to 158,601.32, 218,868.80 and 90,639.08 is: 125,081.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,601.32 : 218,868.80 = 90,639.08 : x
  2. Step 2: Convert to fraction form
    158,601.32/218,868.80 = 90,639.08/x
  3. Step 3: Cross multiply
    158,601.32x = 218,868.80 × 90,639.08
  4. Step 4: Simplify right side
    158,601.32x = 19,838,065,125.16
  5. Step 5: Solve for x
    x = 19,838,065,125.16/158,601.32
  6. Step 6: Final answer
    x = 125,081.34

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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.