Home / 189,730.16-261,711.60-121,724

Finding the Fourth Proportional to 189,730.16, 261,711.60 and 121,724

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Solution

The fourth proportional to 189,730.16, 261,711.60 and 121,724 is: 167,904.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,730.16 : 261,711.60 = 121,724 : x
  2. Step 2: Convert to fraction form
    189,730.16/261,711.60 = 121,724/x
  3. Step 3: Cross multiply
    189,730.16x = 261,711.60 × 121,724
  4. Step 4: Simplify right side
    189,730.16x = 31,856,582,798.40
  5. Step 5: Solve for x
    x = 31,856,582,798.40/189,730.16
  6. Step 6: Final answer
    x = 167,904.69

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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.