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Finding the Fourth Proportional to 78,840.70, 118,293.45 and 28,944.70

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Solution

The fourth proportional to 78,840.70, 118,293.45 and 28,944.70 is: 43,428.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.70 : 118,293.45 = 28,944.70 : x
  2. Step 2: Convert to fraction form
    78,840.70/118,293.45 = 28,944.70/x
  3. Step 3: Cross multiply
    78,840.70x = 118,293.45 × 28,944.70
  4. Step 4: Simplify right side
    78,840.70x = 3,423,968,422.22
  5. Step 5: Solve for x
    x = 3,423,968,422.22/78,840.70
  6. Step 6: Final answer
    x = 43,428.94

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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.