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Finding the Fourth Proportional to 128,720.63, 193,026.22 and 58,644.47

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Solution

The fourth proportional to 128,720.63, 193,026.22 and 58,644.47 is: 87,941.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,720.63 : 193,026.22 = 58,644.47 : x
  2. Step 2: Convert to fraction form
    128,720.63/193,026.22 = 58,644.47/x
  3. Step 3: Cross multiply
    128,720.63x = 193,026.22 × 58,644.47
  4. Step 4: Simplify right side
    128,720.63x = 11,319,920,368.00
  5. Step 5: Solve for x
    x = 11,319,920,368.00/128,720.63
  6. Step 6: Final answer
    x = 87,941.77

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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.