Home / 156,639.89-216,163.07-85,019.90

Finding the Fourth Proportional to 156,639.89, 216,163.07 and 85,019.90

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Solution

The fourth proportional to 156,639.89, 216,163.07 and 85,019.90 is: 117,327.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,639.89 : 216,163.07 = 85,019.90 : x
  2. Step 2: Convert to fraction form
    156,639.89/216,163.07 = 85,019.90/x
  3. Step 3: Cross multiply
    156,639.89x = 216,163.07 × 85,019.90
  4. Step 4: Simplify right side
    156,639.89x = 18,378,161,089.18
  5. Step 5: Solve for x
    x = 18,378,161,089.18/156,639.89
  6. Step 6: Final answer
    x = 117,327.47

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1.5x scale

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.