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Finding the Fourth Proportional to 70,381.36, 105,572.74 and 17,790.86

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Solution

The fourth proportional to 70,381.36, 105,572.74 and 17,790.86 is: 26,686.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,381.36 : 105,572.74 = 17,790.86 : x
  2. Step 2: Convert to fraction form
    70,381.36/105,572.74 = 17,790.86/x
  3. Step 3: Cross multiply
    70,381.36x = 105,572.74 × 17,790.86
  4. Step 4: Simplify right side
    70,381.36x = 1,878,229,837.16
  5. Step 5: Solve for x
    x = 1,878,229,837.16/70,381.36
  6. Step 6: Final answer
    x = 26,686.47

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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.