Home / 135,445.48-186,915.30-78,895.72

Finding the Fourth Proportional to 135,445.48, 186,915.30 and 78,895.72

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Solution

The fourth proportional to 135,445.48, 186,915.30 and 78,895.72 is: 108,876.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,445.48 : 186,915.30 = 78,895.72 : x
  2. Step 2: Convert to fraction form
    135,445.48/186,915.30 = 78,895.72/x
  3. Step 3: Cross multiply
    135,445.48x = 186,915.30 × 78,895.72
  4. Step 4: Simplify right side
    135,445.48x = 14,746,817,172.52
  5. Step 5: Solve for x
    x = 14,746,817,172.52/135,445.48
  6. Step 6: Final answer
    x = 108,876.41

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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.