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Finding the Fourth Proportional to 208,398.58, 312,565.14 and 66,225.13

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Solution

The fourth proportional to 208,398.58, 312,565.14 and 66,225.13 is: 99,327.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,398.58 : 312,565.14 = 66,225.13 : x
  2. Step 2: Convert to fraction form
    208,398.58/312,565.14 = 66,225.13/x
  3. Step 3: Cross multiply
    208,398.58x = 312,565.14 × 66,225.13
  4. Step 4: Simplify right side
    208,398.58x = 20,699,665,775.07
  5. Step 5: Solve for x
    x = 20,699,665,775.07/208,398.58
  6. Step 6: Final answer
    x = 99,327.29

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1.5x scale

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.