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Finding the Fourth Proportional to 215,907.66, 323,783.73 and 91,258.38

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Solution

The fourth proportional to 215,907.66, 323,783.73 and 91,258.38 is: 136,854.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,907.66 : 323,783.73 = 91,258.38 : x
  2. Step 2: Convert to fraction form
    215,907.66/323,783.73 = 91,258.38/x
  3. Step 3: Cross multiply
    215,907.66x = 323,783.73 × 91,258.38
  4. Step 4: Simplify right side
    215,907.66x = 29,547,978,670.16
  5. Step 5: Solve for x
    x = 29,547,978,670.16/215,907.66
  6. Step 6: Final answer
    x = 136,854.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.