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Finding the Fourth Proportional to 118,228.40, 177,342.60 and 39,345.20

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Solution

The fourth proportional to 118,228.40, 177,342.60 and 39,345.20 is: 59,017.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,228.40 : 177,342.60 = 39,345.20 : x
  2. Step 2: Convert to fraction form
    118,228.40/177,342.60 = 39,345.20/x
  3. Step 3: Cross multiply
    118,228.40x = 177,342.60 × 39,345.20
  4. Step 4: Simplify right side
    118,228.40x = 6,977,580,065.52
  5. Step 5: Solve for x
    x = 6,977,580,065.52/118,228.40
  6. Step 6: Final answer
    x = 59,017.80

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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.