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Finding the Fourth Proportional to 138,567.78, 191,096.01 and 90,803.78

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Solution

The fourth proportional to 138,567.78, 191,096.01 and 90,803.78 is: 125,225.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,567.78 : 191,096.01 = 90,803.78 : x
  2. Step 2: Convert to fraction form
    138,567.78/191,096.01 = 90,803.78/x
  3. Step 3: Cross multiply
    138,567.78x = 191,096.01 × 90,803.78
  4. Step 4: Simplify right side
    138,567.78x = 17,352,240,050.92
  5. Step 5: Solve for x
    x = 17,352,240,050.92/138,567.78
  6. Step 6: Final answer
    x = 125,225.65

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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.