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Finding the Fourth Proportional to 129,916.89, 179,285.91 and 70,300.89

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Solution

The fourth proportional to 129,916.89, 179,285.91 and 70,300.89 is: 97,015.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,916.89 : 179,285.91 = 70,300.89 : x
  2. Step 2: Convert to fraction form
    129,916.89/179,285.91 = 70,300.89/x
  3. Step 3: Cross multiply
    129,916.89x = 179,285.91 × 70,300.89
  4. Step 4: Simplify right side
    129,916.89x = 12,603,959,037.46
  5. Step 5: Solve for x
    x = 12,603,959,037.46/129,916.89
  6. Step 6: Final answer
    x = 97,015.55

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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.