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Finding the Fourth Proportional to 208,479.17, 312,741.75 and 66,291.19

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Solution

The fourth proportional to 208,479.17, 312,741.75 and 66,291.19 is: 99,444.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,479.17 : 312,741.75 = 66,291.19 : x
  2. Step 2: Convert to fraction form
    208,479.17/312,741.75 = 66,291.19/x
  3. Step 3: Cross multiply
    208,479.17x = 312,741.75 × 66,291.19
  4. Step 4: Simplify right side
    208,479.17x = 20,732,020,875.02
  5. Step 5: Solve for x
    x = 20,732,020,875.02/208,479.17
  6. Step 6: Final answer
    x = 99,444.09

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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.