Home / 105,365.14-145,456.77-81,437.74

Finding the Fourth Proportional to 105,365.14, 145,456.77 and 81,437.74

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Solution

The fourth proportional to 105,365.14, 145,456.77 and 81,437.74 is: 112,424.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,365.14 : 145,456.77 = 81,437.74 : x
  2. Step 2: Convert to fraction form
    105,365.14/145,456.77 = 81,437.74/x
  3. Step 3: Cross multiply
    105,365.14x = 145,456.77 × 81,437.74
  4. Step 4: Simplify right side
    105,365.14x = 11,845,670,616.50
  5. Step 5: Solve for x
    x = 11,845,670,616.50/105,365.14
  6. Step 6: Final answer
    x = 112,424.95

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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.