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Finding the Fourth Proportional to 60,878, 84,011.40 and 34,020.50

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Solution

The fourth proportional to 60,878, 84,011.40 and 34,020.50 is: 46,948.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,878 : 84,011.40 = 34,020.50 : x
  2. Step 2: Convert to fraction form
    60,878/84,011.40 = 34,020.50/x
  3. Step 3: Cross multiply
    60,878x = 84,011.40 × 34,020.50
  4. Step 4: Simplify right side
    60,878x = 2,858,109,833.70
  5. Step 5: Solve for x
    x = 2,858,109,833.70/60,878
  6. Step 6: Final answer
    x = 46,948.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.