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Finding the Fourth Proportional to 53,817.20, 80,725.80 and 42,140.40

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Solution

The fourth proportional to 53,817.20, 80,725.80 and 42,140.40 is: 63,210.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,817.20 : 80,725.80 = 42,140.40 : x
  2. Step 2: Convert to fraction form
    53,817.20/80,725.80 = 42,140.40/x
  3. Step 3: Cross multiply
    53,817.20x = 80,725.80 × 42,140.40
  4. Step 4: Simplify right side
    53,817.20x = 3,401,817,502.32
  5. Step 5: Solve for x
    x = 3,401,817,502.32/53,817.20
  6. Step 6: Final answer
    x = 63,210.60

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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.