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Finding the Fourth Proportional to 105,670.88, 145,840.73 and 65,397.61

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Solution

The fourth proportional to 105,670.88, 145,840.73 and 65,397.61 is: 90,257.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,670.88 : 145,840.73 = 65,397.61 : x
  2. Step 2: Convert to fraction form
    105,670.88/145,840.73 = 65,397.61/x
  3. Step 3: Cross multiply
    105,670.88x = 145,840.73 × 65,397.61
  4. Step 4: Simplify right side
    105,670.88x = 9,537,635,182.66
  5. Step 5: Solve for x
    x = 9,537,635,182.66/105,670.88
  6. Step 6: Final answer
    x = 90,257.93

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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.