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Finding the Fourth Proportional to 70,437.06, 105,689.79 and 30,989.07

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Solution

The fourth proportional to 70,437.06, 105,689.79 and 30,989.07 is: 46,498.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,437.06 : 105,689.79 = 30,989.07 : x
  2. Step 2: Convert to fraction form
    70,437.06/105,689.79 = 30,989.07/x
  3. Step 3: Cross multiply
    70,437.06x = 105,689.79 × 30,989.07
  4. Step 4: Simplify right side
    70,437.06x = 3,275,228,300.60
  5. Step 5: Solve for x
    x = 3,275,228,300.60/70,437.06
  6. Step 6: Final answer
    x = 46,498.65

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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.