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Finding the Fourth Proportional to 129,960, 179,345.34 and 70,344

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Solution

The fourth proportional to 129,960, 179,345.34 and 70,344 is: 97,075.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,960 : 179,345.34 = 70,344 : x
  2. Step 2: Convert to fraction form
    129,960/179,345.34 = 70,344/x
  3. Step 3: Cross multiply
    129,960x = 179,345.34 × 70,344
  4. Step 4: Simplify right side
    129,960x = 12,615,868,596.96
  5. Step 5: Solve for x
    x = 12,615,868,596.96/129,960
  6. Step 6: Final answer
    x = 97,075.01

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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.