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Finding the Fourth Proportional to 235,887.15, 325,528.16 and 128,459.28

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Solution

The fourth proportional to 235,887.15, 325,528.16 and 128,459.28 is: 177,275.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,887.15 : 325,528.16 = 128,459.28 : x
  2. Step 2: Convert to fraction form
    235,887.15/325,528.16 = 128,459.28/x
  3. Step 3: Cross multiply
    235,887.15x = 325,528.16 × 128,459.28
  4. Step 4: Simplify right side
    235,887.15x = 41,817,113,053.32
  5. Step 5: Solve for x
    x = 41,817,113,053.32/235,887.15
  6. Step 6: Final answer
    x = 177,275.93

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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.