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Finding the Fourth Proportional to 124,317.80, 186,476.70 and 77,078.60

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Solution

The fourth proportional to 124,317.80, 186,476.70 and 77,078.60 is: 115,617.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,317.80 : 186,476.70 = 77,078.60 : x
  2. Step 2: Convert to fraction form
    124,317.80/186,476.70 = 77,078.60/x
  3. Step 3: Cross multiply
    124,317.80x = 186,476.70 × 77,078.60
  4. Step 4: Simplify right side
    124,317.80x = 14,373,362,968.62
  5. Step 5: Solve for x
    x = 14,373,362,968.62/124,317.80
  6. Step 6: Final answer
    x = 115,617.90

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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.