Home / 156,117.20-215,295.51-103,636.36

Finding the Fourth Proportional to 156,117.20, 215,295.51 and 103,636.36

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Solution

The fourth proportional to 156,117.20, 215,295.51 and 103,636.36 is: 142,921.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,117.20 : 215,295.51 = 103,636.36 : x
  2. Step 2: Convert to fraction form
    156,117.20/215,295.51 = 103,636.36/x
  3. Step 3: Cross multiply
    156,117.20x = 215,295.51 × 103,636.36
  4. Step 4: Simplify right side
    156,117.20x = 22,312,442,980.74
  5. Step 5: Solve for x
    x = 22,312,442,980.74/156,117.20
  6. Step 6: Final answer
    x = 142,921.11

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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.