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Finding the Fourth Proportional to 70,291.10, 105,436.74 and 17,700.20

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Solution

The fourth proportional to 70,291.10, 105,436.74 and 17,700.20 is: 26,550.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,291.10 : 105,436.74 = 17,700.20 : x
  2. Step 2: Convert to fraction form
    70,291.10/105,436.74 = 17,700.20/x
  3. Step 3: Cross multiply
    70,291.10x = 105,436.74 × 17,700.20
  4. Step 4: Simplify right side
    70,291.10x = 1,866,251,385.35
  5. Step 5: Solve for x
    x = 1,866,251,385.35/70,291.10
  6. Step 6: Final answer
    x = 26,550.32

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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.