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Finding the Fourth Proportional to 86,424.70, 119,321.14 and 70,546.90

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Solution

The fourth proportional to 86,424.70, 119,321.14 and 70,546.90 is: 97,399.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,424.70 : 119,321.14 = 70,546.90 : x
  2. Step 2: Convert to fraction form
    86,424.70/119,321.14 = 70,546.90/x
  3. Step 3: Cross multiply
    86,424.70x = 119,321.14 × 70,546.90
  4. Step 4: Simplify right side
    86,424.70x = 8,417,736,531.47
  5. Step 5: Solve for x
    x = 8,417,736,531.47/86,424.70
  6. Step 6: Final answer
    x = 97,399.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.