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Finding the Fourth Proportional to 235,552.80, 325,068.21 and 128,128.58

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Solution

The fourth proportional to 235,552.80, 325,068.21 and 128,128.58 is: 176,820.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,552.80 : 325,068.21 = 128,128.58 : x
  2. Step 2: Convert to fraction form
    235,552.80/325,068.21 = 128,128.58/x
  3. Step 3: Cross multiply
    235,552.80x = 325,068.21 × 128,128.58
  4. Step 4: Simplify right side
    235,552.80x = 41,650,526,525.10
  5. Step 5: Solve for x
    x = 41,650,526,525.10/235,552.80
  6. Step 6: Final answer
    x = 176,820.34

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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.