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Finding the Fourth Proportional to 129,968, 179,356.38 and 70,352

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Solution

The fourth proportional to 129,968, 179,356.38 and 70,352 is: 97,086.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,968 : 179,356.38 = 70,352 : x
  2. Step 2: Convert to fraction form
    129,968/179,356.38 = 70,352/x
  3. Step 3: Cross multiply
    129,968x = 179,356.38 × 70,352
  4. Step 4: Simplify right side
    129,968x = 12,618,080,045.76
  5. Step 5: Solve for x
    x = 12,618,080,045.76/129,968
  6. Step 6: Final answer
    x = 97,086.05

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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.