Home / 156,428.32-215,071.74-139,269.28

Finding the Fourth Proportional to 156,428.32, 215,071.74 and 139,269.28

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Solution

The fourth proportional to 156,428.32, 215,071.74 and 139,269.28 is: 191,479.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,428.32 : 215,071.74 = 139,269.28 : x
  2. Step 2: Convert to fraction form
    156,428.32/215,071.74 = 139,269.28/x
  3. Step 3: Cross multiply
    156,428.32x = 215,071.74 × 139,269.28
  4. Step 4: Simplify right side
    156,428.32x = 29,952,886,378.15
  5. Step 5: Solve for x
    x = 29,952,886,378.15/156,428.32
  6. Step 6: Final answer
    x = 191,479.95

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.