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Finding the Fourth Proportional to 152,011.71, 209,816.34 and 87,488.88

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Solution

The fourth proportional to 152,011.71, 209,816.34 and 87,488.88 is: 120,757.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,011.71 : 209,816.34 = 87,488.88 : x
  2. Step 2: Convert to fraction form
    152,011.71/209,816.34 = 87,488.88/x
  3. Step 3: Cross multiply
    152,011.71x = 209,816.34 × 87,488.88
  4. Step 4: Simplify right side
    152,011.71x = 18,356,597,370.76
  5. Step 5: Solve for x
    x = 18,356,597,370.76/152,011.71
  6. Step 6: Final answer
    x = 120,757.79

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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.