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Finding the Fourth Proportional to 207,518.51, 310,778.75 and 118,502.21

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Solution

The fourth proportional to 207,518.51, 310,778.75 and 118,502.21 is: 177,468.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,518.51 : 310,778.75 = 118,502.21 : x
  2. Step 2: Convert to fraction form
    207,518.51/310,778.75 = 118,502.21/x
  3. Step 3: Cross multiply
    207,518.51x = 310,778.75 × 118,502.21
  4. Step 4: Simplify right side
    207,518.51x = 36,827,967,438.40
  5. Step 5: Solve for x
    x = 36,827,967,438.40/207,518.51
  6. Step 6: Final answer
    x = 177,468.35

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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.