Home / 189,721.17-261,807.18-103,678.11

Finding the Fourth Proportional to 189,721.17, 261,807.18 and 103,678.11

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Solution

The fourth proportional to 189,721.17, 261,807.18 and 103,678.11 is: 143,071.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,721.17 : 261,807.18 = 103,678.11 : x
  2. Step 2: Convert to fraction form
    189,721.17/261,807.18 = 103,678.11/x
  3. Step 3: Cross multiply
    189,721.17x = 261,807.18 × 103,678.11
  4. Step 4: Simplify right side
    189,721.17x = 27,143,673,606.83
  5. Step 5: Solve for x
    x = 27,143,673,606.83/189,721.17
  6. Step 6: Final answer
    x = 143,071.40

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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.