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Finding the Fourth Proportional to 153,989.80, 230,855.10 and 80,117.80

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Solution

The fourth proportional to 153,989.80, 230,855.10 and 80,117.80 is: 120,109.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,989.80 : 230,855.10 = 80,117.80 : x
  2. Step 2: Convert to fraction form
    153,989.80/230,855.10 = 80,117.80/x
  3. Step 3: Cross multiply
    153,989.80x = 230,855.10 × 80,117.80
  4. Step 4: Simplify right side
    153,989.80x = 18,495,602,730.78
  5. Step 5: Solve for x
    x = 18,495,602,730.78/153,989.80
  6. Step 6: Final answer
    x = 120,109.27

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1.5x scale

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.