Home / 78,779.90-118,071.30-39,348.02

Finding the Fourth Proportional to 78,779.90, 118,071.30 and 39,348.02

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Solution

The fourth proportional to 78,779.90, 118,071.30 and 39,348.02 is: 58,972.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,779.90 : 118,071.30 = 39,348.02 : x
  2. Step 2: Convert to fraction form
    78,779.90/118,071.30 = 39,348.02/x
  3. Step 3: Cross multiply
    78,779.90x = 118,071.30 × 39,348.02
  4. Step 4: Simplify right side
    78,779.90x = 4,645,871,873.83
  5. Step 5: Solve for x
    x = 4,645,871,873.83/78,779.90
  6. Step 6: Final answer
    x = 58,972.81

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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.