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Finding the Fourth Proportional to 129,930, 179,303.40 and 70,314

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Solution

The fourth proportional to 129,930, 179,303.40 and 70,314 is: 97,033.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,930 : 179,303.40 = 70,314 : x
  2. Step 2: Convert to fraction form
    129,930/179,303.40 = 70,314/x
  3. Step 3: Cross multiply
    129,930x = 179,303.40 × 70,314
  4. Step 4: Simplify right side
    129,930x = 12,607,539,267.60
  5. Step 5: Solve for x
    x = 12,607,539,267.60/129,930
  6. Step 6: Final answer
    x = 97,033.32

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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.