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Finding the Fourth Proportional to 105,672.04, 145,842.37 and 65,398.79

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Solution

The fourth proportional to 105,672.04, 145,842.37 and 65,398.79 is: 90,259.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,672.04 : 145,842.37 = 65,398.79 : x
  2. Step 2: Convert to fraction form
    105,672.04/145,842.37 = 65,398.79/x
  3. Step 3: Cross multiply
    105,672.04x = 145,842.37 × 65,398.79
  4. Step 4: Simplify right side
    105,672.04x = 9,537,914,729.84
  5. Step 5: Solve for x
    x = 9,537,914,729.84/105,672.04
  6. Step 6: Final answer
    x = 90,259.59

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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.