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Finding the Fourth Proportional to 70,399.32, 105,580.44 and 26,038.78

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Solution

The fourth proportional to 70,399.32, 105,580.44 and 26,038.78 is: 39,051.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,399.32 : 105,580.44 = 26,038.78 : x
  2. Step 2: Convert to fraction form
    70,399.32/105,580.44 = 26,038.78/x
  3. Step 3: Cross multiply
    70,399.32x = 105,580.44 × 26,038.78
  4. Step 4: Simplify right side
    70,399.32x = 2,749,185,849.46
  5. Step 5: Solve for x
    x = 2,749,185,849.46/70,399.32
  6. Step 6: Final answer
    x = 39,051.31

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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.