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Finding the Fourth Proportional to 70,290.18, 105,435.27 and 17,703.77

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Solution

The fourth proportional to 70,290.18, 105,435.27 and 17,703.77 is: 26,555.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,290.18 : 105,435.27 = 17,703.77 : x
  2. Step 2: Convert to fraction form
    70,290.18/105,435.27 = 17,703.77/x
  3. Step 3: Cross multiply
    70,290.18x = 105,435.27 × 17,703.77
  4. Step 4: Simplify right side
    70,290.18x = 1,866,601,242.79
  5. Step 5: Solve for x
    x = 1,866,601,242.79/70,290.18
  6. Step 6: Final answer
    x = 26,555.65

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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.