Home / 78,785.15-118,106.65-28,830.43

Finding the Fourth Proportional to 78,785.15, 118,106.65 and 28,830.43

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Solution

The fourth proportional to 78,785.15, 118,106.65 and 28,830.43 is: 43,219.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,785.15 : 118,106.65 = 28,830.43 : x
  2. Step 2: Convert to fraction form
    78,785.15/118,106.65 = 28,830.43/x
  3. Step 3: Cross multiply
    78,785.15x = 118,106.65 × 28,830.43
  4. Step 4: Simplify right side
    78,785.15x = 3,405,064,770.67
  5. Step 5: Solve for x
    x = 3,405,064,770.67/78,785.15
  6. Step 6: Final answer
    x = 43,219.63

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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.