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Finding the Fourth Proportional to 423,068, 634,539.66 and 138,788.54

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Solution

The fourth proportional to 423,068, 634,539.66 and 138,788.54 is: 208,162.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,068 : 634,539.66 = 138,788.54 : x
  2. Step 2: Convert to fraction form
    423,068/634,539.66 = 138,788.54/x
  3. Step 3: Cross multiply
    423,068x = 634,539.66 × 138,788.54
  4. Step 4: Simplify right side
    423,068x = 88,066,832,983.50
  5. Step 5: Solve for x
    x = 88,066,832,983.50/423,068
  6. Step 6: Final answer
    x = 208,162.36

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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.