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Finding the Fourth Proportional to 158,624.32, 218,913.06 and 90,639.72

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Solution

The fourth proportional to 158,624.32, 218,913.06 and 90,639.72 is: 125,089.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,624.32 : 218,913.06 = 90,639.72 : x
  2. Step 2: Convert to fraction form
    158,624.32/218,913.06 = 90,639.72/x
  3. Step 3: Cross multiply
    158,624.32x = 218,913.06 × 90,639.72
  4. Step 4: Simplify right side
    158,624.32x = 19,842,218,462.74
  5. Step 5: Solve for x
    x = 19,842,218,462.74/158,624.32
  6. Step 6: Final answer
    x = 125,089.38

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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.