Home / 156,309.15-215,706.20-84,689.22

Finding the Fourth Proportional to 156,309.15, 215,706.20 and 84,689.22

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Solution

The fourth proportional to 156,309.15, 215,706.20 and 84,689.22 is: 116,870.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,309.15 : 215,706.20 = 84,689.22 : x
  2. Step 2: Convert to fraction form
    156,309.15/215,706.20 = 84,689.22/x
  3. Step 3: Cross multiply
    156,309.15x = 215,706.20 × 84,689.22
  4. Step 4: Simplify right side
    156,309.15x = 18,267,989,403.72
  5. Step 5: Solve for x
    x = 18,267,989,403.72/156,309.15
  6. Step 6: Final answer
    x = 116,870.89

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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.