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Finding the Fourth Proportional to 98,931, 136,533.42 and 54,227.64

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Solution

The fourth proportional to 98,931, 136,533.42 and 54,227.64 is: 74,838.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,931 : 136,533.42 = 54,227.64 : x
  2. Step 2: Convert to fraction form
    98,931/136,533.42 = 54,227.64/x
  3. Step 3: Cross multiply
    98,931x = 136,533.42 × 54,227.64
  4. Step 4: Simplify right side
    98,931x = 7,403,885,147.73
  5. Step 5: Solve for x
    x = 7,403,885,147.73/98,931
  6. Step 6: Final answer
    x = 74,838.88

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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.