Home / 109,108.28-149,916.91-86,713.40

Finding the Fourth Proportional to 109,108.28, 149,916.91 and 86,713.40

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Solution

The fourth proportional to 109,108.28, 149,916.91 and 86,713.40 is: 119,145.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,108.28 : 149,916.91 = 86,713.40 : x
  2. Step 2: Convert to fraction form
    109,108.28/149,916.91 = 86,713.40/x
  3. Step 3: Cross multiply
    109,108.28x = 149,916.91 × 86,713.40
  4. Step 4: Simplify right side
    109,108.28x = 12,999,804,983.59
  5. Step 5: Solve for x
    x = 12,999,804,983.59/109,108.28
  6. Step 6: Final answer
    x = 119,145.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.