Home / 121,022.20-181,533.30-87,585.40

Finding the Fourth Proportional to 121,022.20, 181,533.30 and 87,585.40

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Solution

The fourth proportional to 121,022.20, 181,533.30 and 87,585.40 is: 131,378.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,022.20 : 181,533.30 = 87,585.40 : x
  2. Step 2: Convert to fraction form
    121,022.20/181,533.30 = 87,585.40/x
  3. Step 3: Cross multiply
    121,022.20x = 181,533.30 × 87,585.40
  4. Step 4: Simplify right side
    121,022.20x = 15,899,666,693.82
  5. Step 5: Solve for x
    x = 15,899,666,693.82/121,022.20
  6. Step 6: Final answer
    x = 131,378.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.