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Finding the Fourth Proportional to 128,315.55, 192,455.10 and 44,079.60

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Solution

The fourth proportional to 128,315.55, 192,455.10 and 44,079.60 is: 66,113.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,315.55 : 192,455.10 = 44,079.60 : x
  2. Step 2: Convert to fraction form
    128,315.55/192,455.10 = 44,079.60/x
  3. Step 3: Cross multiply
    128,315.55x = 192,455.10 × 44,079.60
  4. Step 4: Simplify right side
    128,315.55x = 8,483,343,825.96
  5. Step 5: Solve for x
    x = 8,483,343,825.96/128,315.55
  6. Step 6: Final answer
    x = 66,113.14

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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.