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Finding the Fourth Proportional to 78,779.84, 118,108.32 and 39,317.12

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Solution

The fourth proportional to 78,779.84, 118,108.32 and 39,317.12 is: 58,945.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,779.84 : 118,108.32 = 39,317.12 : x
  2. Step 2: Convert to fraction form
    78,779.84/118,108.32 = 39,317.12/x
  3. Step 3: Cross multiply
    78,779.84x = 118,108.32 × 39,317.12
  4. Step 4: Simplify right side
    78,779.84x = 4,643,678,990.44
  5. Step 5: Solve for x
    x = 4,643,678,990.44/78,779.84
  6. Step 6: Final answer
    x = 58,945.02

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1.5x scale

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.