Home / 78,783.90-118,077.30-39,352.02

Finding the Fourth Proportional to 78,783.90, 118,077.30 and 39,352.02

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Solution

The fourth proportional to 78,783.90, 118,077.30 and 39,352.02 is: 58,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,783.90 : 118,077.30 = 39,352.02 : x
  2. Step 2: Convert to fraction form
    78,783.90/118,077.30 = 39,352.02/x
  3. Step 3: Cross multiply
    78,783.90x = 118,077.30 × 39,352.02
  4. Step 4: Simplify right side
    78,783.90x = 4,646,580,271.15
  5. Step 5: Solve for x
    x = 4,646,580,271.15/78,783.90
  6. Step 6: Final answer
    x = 58,978.80

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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.