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Finding the Fourth Proportional to 48,008.60, 72,012.90 and 40,405.40

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Solution

The fourth proportional to 48,008.60, 72,012.90 and 40,405.40 is: 60,608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,008.60 : 72,012.90 = 40,405.40 : x
  2. Step 2: Convert to fraction form
    48,008.60/72,012.90 = 40,405.40/x
  3. Step 3: Cross multiply
    48,008.60x = 72,012.90 × 40,405.40
  4. Step 4: Simplify right side
    48,008.60x = 2,909,710,029.66
  5. Step 5: Solve for x
    x = 2,909,710,029.66/48,008.60
  6. Step 6: Final answer
    x = 60,608.10

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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.