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Finding the Fourth Proportional to 129,987, 179,382.06 and 70,371

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Solution

The fourth proportional to 129,987, 179,382.06 and 70,371 is: 97,111.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,987 : 179,382.06 = 70,371 : x
  2. Step 2: Convert to fraction form
    129,987/179,382.06 = 70,371/x
  3. Step 3: Cross multiply
    129,987x = 179,382.06 × 70,371
  4. Step 4: Simplify right side
    129,987x = 12,623,294,944.26
  5. Step 5: Solve for x
    x = 12,623,294,944.26/129,987
  6. Step 6: Final answer
    x = 97,111.98

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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.