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Finding the Fourth Proportional to 154,208.71, 212,798.14 and 86,231.28

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Solution

The fourth proportional to 154,208.71, 212,798.14 and 86,231.28 is: 118,993.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,208.71 : 212,798.14 = 86,231.28 : x
  2. Step 2: Convert to fraction form
    154,208.71/212,798.14 = 86,231.28/x
  3. Step 3: Cross multiply
    154,208.71x = 212,798.14 × 86,231.28
  4. Step 4: Simplify right side
    154,208.71x = 18,349,856,576.23
  5. Step 5: Solve for x
    x = 18,349,856,576.23/154,208.71
  6. Step 6: Final answer
    x = 118,993.64

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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.