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Finding the Fourth Proportional to 138,567.66, 191,095.84 and 90,803.66

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Solution

The fourth proportional to 138,567.66, 191,095.84 and 90,803.66 is: 125,225.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,567.66 : 191,095.84 = 90,803.66 : x
  2. Step 2: Convert to fraction form
    138,567.66/191,095.84 = 90,803.66/x
  3. Step 3: Cross multiply
    138,567.66x = 191,095.84 × 90,803.66
  4. Step 4: Simplify right side
    138,567.66x = 17,352,200,500.29
  5. Step 5: Solve for x
    x = 17,352,200,500.29/138,567.66
  6. Step 6: Final answer
    x = 125,225.48

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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.