Home / 78,777.90-118,068.30-39,346.02

Finding the Fourth Proportional to 78,777.90, 118,068.30 and 39,346.02

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Solution

The fourth proportional to 78,777.90, 118,068.30 and 39,346.02 is: 58,969.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,777.90 : 118,068.30 = 39,346.02 : x
  2. Step 2: Convert to fraction form
    78,777.90/118,068.30 = 39,346.02/x
  3. Step 3: Cross multiply
    78,777.90x = 118,068.30 × 39,346.02
  4. Step 4: Simplify right side
    78,777.90x = 4,645,517,693.17
  5. Step 5: Solve for x
    x = 4,645,517,693.17/78,777.90
  6. Step 6: Final answer
    x = 58,969.81

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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.