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Finding the Fourth Proportional to 78,705.70, 118,058.55 and 50,712.10

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Solution

The fourth proportional to 78,705.70, 118,058.55 and 50,712.10 is: 76,068.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,705.70 : 118,058.55 = 50,712.10 : x
  2. Step 2: Convert to fraction form
    78,705.70/118,058.55 = 50,712.10/x
  3. Step 3: Cross multiply
    78,705.70x = 118,058.55 × 50,712.10
  4. Step 4: Simplify right side
    78,705.70x = 5,986,996,993.46
  5. Step 5: Solve for x
    x = 5,986,996,993.46/78,705.70
  6. Step 6: Final answer
    x = 76,068.15

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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.