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Finding the Fourth Proportional to 85,980.48, 128,682.48 and 63,060.72

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Solution

The fourth proportional to 85,980.48, 128,682.48 and 63,060.72 is: 94,379.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,980.48 : 128,682.48 = 63,060.72 : x
  2. Step 2: Convert to fraction form
    85,980.48/128,682.48 = 63,060.72/x
  3. Step 3: Cross multiply
    85,980.48x = 128,682.48 × 63,060.72
  4. Step 4: Simplify right side
    85,980.48x = 8,114,809,840.19
  5. Step 5: Solve for x
    x = 8,114,809,840.19/85,980.48
  6. Step 6: Final answer
    x = 94,379.68

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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.