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Finding the Fourth Proportional to 100,346.88, 138,496.32 and 68,504.16

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Solution

The fourth proportional to 100,346.88, 138,496.32 and 68,504.16 is: 94,547.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,346.88 : 138,496.32 = 68,504.16 : x
  2. Step 2: Convert to fraction form
    100,346.88/138,496.32 = 68,504.16/x
  3. Step 3: Cross multiply
    100,346.88x = 138,496.32 × 68,504.16
  4. Step 4: Simplify right side
    100,346.88x = 9,487,574,064.69
  5. Step 5: Solve for x
    x = 9,487,574,064.69/100,346.88
  6. Step 6: Final answer
    x = 94,547.77

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1.5x scale

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.