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Finding the Fourth Proportional to 118,720.80, 178,196.40 and 59,623.20

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Solution

The fourth proportional to 118,720.80, 178,196.40 and 59,623.20 is: 89,492.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,720.80 : 178,196.40 = 59,623.20 : x
  2. Step 2: Convert to fraction form
    118,720.80/178,196.40 = 59,623.20/x
  3. Step 3: Cross multiply
    118,720.80x = 178,196.40 × 59,623.20
  4. Step 4: Simplify right side
    118,720.80x = 10,624,639,596.48
  5. Step 5: Solve for x
    x = 10,624,639,596.48/118,720.80
  6. Step 6: Final answer
    x = 89,492.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.