Home / 78,840.37-118,276.13-28,920.93

Finding the Fourth Proportional to 78,840.37, 118,276.13 and 28,920.93

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Solution

The fourth proportional to 78,840.37, 118,276.13 and 28,920.93 is: 43,387.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.37 : 118,276.13 = 28,920.93 : x
  2. Step 2: Convert to fraction form
    78,840.37/118,276.13 = 28,920.93/x
  3. Step 3: Cross multiply
    78,840.37x = 118,276.13 × 28,920.93
  4. Step 4: Simplify right side
    78,840.37x = 3,420,654,940.42
  5. Step 5: Solve for x
    x = 3,420,654,940.42/78,840.37
  6. Step 6: Final answer
    x = 43,387.10

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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.