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Finding the Fourth Proportional to 120,690.36, 166,572.72 and 70,389.36

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Solution

The fourth proportional to 120,690.36, 166,572.72 and 70,389.36 is: 97,148.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,690.36 : 166,572.72 = 70,389.36 : x
  2. Step 2: Convert to fraction form
    120,690.36/166,572.72 = 70,389.36/x
  3. Step 3: Cross multiply
    120,690.36x = 166,572.72 × 70,389.36
  4. Step 4: Simplify right side
    120,690.36x = 11,724,947,154.26
  5. Step 5: Solve for x
    x = 11,724,947,154.26/120,690.36
  6. Step 6: Final answer
    x = 97,148.99

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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.