Home / 156,025-215,315.04-84,405.36

Finding the Fourth Proportional to 156,025, 215,315.04 and 84,405.36

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Solution

The fourth proportional to 156,025, 215,315.04 and 84,405.36 is: 116,479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,025 : 215,315.04 = 84,405.36 : x
  2. Step 2: Convert to fraction form
    156,025/215,315.04 = 84,405.36/x
  3. Step 3: Cross multiply
    156,025x = 215,315.04 × 84,405.36
  4. Step 4: Simplify right side
    156,025x = 18,173,743,464.61
  5. Step 5: Solve for x
    x = 18,173,743,464.61/156,025
  6. Step 6: Final answer
    x = 116,479.69

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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.