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Finding the Fourth Proportional to 40,087.80, 60,131.70 and 19,313.40

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Solution

The fourth proportional to 40,087.80, 60,131.70 and 19,313.40 is: 28,970.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,087.80 : 60,131.70 = 19,313.40 : x
  2. Step 2: Convert to fraction form
    40,087.80/60,131.70 = 19,313.40/x
  3. Step 3: Cross multiply
    40,087.80x = 60,131.70 × 19,313.40
  4. Step 4: Simplify right side
    40,087.80x = 1,161,347,574.78
  5. Step 5: Solve for x
    x = 1,161,347,574.78/40,087.80
  6. Step 6: Final answer
    x = 28,970.10

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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.