Home / 100,688.49-138,915.51-62,434.26

Finding the Fourth Proportional to 100,688.49, 138,915.51 and 62,434.26

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Solution

The fourth proportional to 100,688.49, 138,915.51 and 62,434.26 is: 86,137.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,688.49 : 138,915.51 = 62,434.26 : x
  2. Step 2: Convert to fraction form
    100,688.49/138,915.51 = 62,434.26/x
  3. Step 3: Cross multiply
    100,688.49x = 138,915.51 × 62,434.26
  4. Step 4: Simplify right side
    100,688.49x = 8,673,087,069.37
  5. Step 5: Solve for x
    x = 8,673,087,069.37/100,688.49
  6. Step 6: Final answer
    x = 86,137.82

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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.