Home / 156,515.36-216,035.52-128,288.48

Finding the Fourth Proportional to 156,515.36, 216,035.52 and 128,288.48

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Solution

The fourth proportional to 156,515.36, 216,035.52 and 128,288.48 is: 177,074.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,515.36 : 216,035.52 = 128,288.48 : x
  2. Step 2: Convert to fraction form
    156,515.36/216,035.52 = 128,288.48/x
  3. Step 3: Cross multiply
    156,515.36x = 216,035.52 × 128,288.48
  4. Step 4: Simplify right side
    156,515.36x = 27,714,868,486.81
  5. Step 5: Solve for x
    x = 27,714,868,486.81/156,515.36
  6. Step 6: Final answer
    x = 177,074.43

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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.