Home / 78,781.58-118,117.01-28,855.19

Finding the Fourth Proportional to 78,781.58, 118,117.01 and 28,855.19

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Solution

The fourth proportional to 78,781.58, 118,117.01 and 28,855.19 is: 43,262.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,781.58 : 118,117.01 = 28,855.19 : x
  2. Step 2: Convert to fraction form
    78,781.58/118,117.01 = 28,855.19/x
  3. Step 3: Cross multiply
    78,781.58x = 118,117.01 × 28,855.19
  4. Step 4: Simplify right side
    78,781.58x = 3,408,288,030.92
  5. Step 5: Solve for x
    x = 3,408,288,030.92/78,781.58
  6. Step 6: Final answer
    x = 43,262.50

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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.