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Finding the Fourth Proportional to 72,420.60, 108,630.90 and 54,924.60

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Solution

The fourth proportional to 72,420.60, 108,630.90 and 54,924.60 is: 82,386.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,420.60 : 108,630.90 = 54,924.60 : x
  2. Step 2: Convert to fraction form
    72,420.60/108,630.90 = 54,924.60/x
  3. Step 3: Cross multiply
    72,420.60x = 108,630.90 × 54,924.60
  4. Step 4: Simplify right side
    72,420.60x = 5,966,508,730.14
  5. Step 5: Solve for x
    x = 5,966,508,730.14/72,420.60
  6. Step 6: Final answer
    x = 82,386.90

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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.