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Finding the Fourth Proportional to 207,266.16, 310,852.80 and 80,909.40

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Solution

The fourth proportional to 207,266.16, 310,852.80 and 80,909.40 is: 121,345.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,266.16 : 310,852.80 = 80,909.40 : x
  2. Step 2: Convert to fraction form
    207,266.16/310,852.80 = 80,909.40/x
  3. Step 3: Cross multiply
    207,266.16x = 310,852.80 × 80,909.40
  4. Step 4: Simplify right side
    207,266.16x = 25,150,913,536.32
  5. Step 5: Solve for x
    x = 25,150,913,536.32/207,266.16
  6. Step 6: Final answer
    x = 121,345.97

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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.