Home / 115,506.72-159,312.96-77,773.68

Finding the Fourth Proportional to 115,506.72, 159,312.96 and 77,773.68

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Solution

The fourth proportional to 115,506.72, 159,312.96 and 77,773.68 is: 107,269.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,506.72 : 159,312.96 = 77,773.68 : x
  2. Step 2: Convert to fraction form
    115,506.72/159,312.96 = 77,773.68/x
  3. Step 3: Cross multiply
    115,506.72x = 159,312.96 × 77,773.68
  4. Step 4: Simplify right side
    115,506.72x = 12,390,355,170.89
  5. Step 5: Solve for x
    x = 12,390,355,170.89/115,506.72
  6. Step 6: Final answer
    x = 107,269.56

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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.