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Finding the Fourth Proportional to 40,003.60, 60,005.40 and 39,420.40

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Solution

The fourth proportional to 40,003.60, 60,005.40 and 39,420.40 is: 59,130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,003.60 : 60,005.40 = 39,420.40 : x
  2. Step 2: Convert to fraction form
    40,003.60/60,005.40 = 39,420.40/x
  3. Step 3: Cross multiply
    40,003.60x = 60,005.40 × 39,420.40
  4. Step 4: Simplify right side
    40,003.60x = 2,365,436,870.16
  5. Step 5: Solve for x
    x = 2,365,436,870.16/40,003.60
  6. Step 6: Final answer
    x = 59,130.60

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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.