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Finding the Fourth Proportional to 129,809.39, 179,109.15 and 97,578.47

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Solution

The fourth proportional to 129,809.39, 179,109.15 and 97,578.47 is: 134,637.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,809.39 : 179,109.15 = 97,578.47 : x
  2. Step 2: Convert to fraction form
    129,809.39/179,109.15 = 97,578.47/x
  3. Step 3: Cross multiply
    129,809.39x = 179,109.15 × 97,578.47
  4. Step 4: Simplify right side
    129,809.39x = 17,477,197,176.29
  5. Step 5: Solve for x
    x = 17,477,197,176.29/129,809.39
  6. Step 6: Final answer
    x = 134,637.39

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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.