Home / 100,528.17-138,735.95-66,477.48

Finding the Fourth Proportional to 100,528.17, 138,735.95 and 66,477.48

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Solution

The fourth proportional to 100,528.17, 138,735.95 and 66,477.48 is: 91,743.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,528.17 : 138,735.95 = 66,477.48 : x
  2. Step 2: Convert to fraction form
    100,528.17/138,735.95 = 66,477.48/x
  3. Step 3: Cross multiply
    100,528.17x = 138,735.95 × 66,477.48
  4. Step 4: Simplify right side
    100,528.17x = 9,222,816,341.41
  5. Step 5: Solve for x
    x = 9,222,816,341.41/100,528.17
  6. Step 6: Final answer
    x = 91,743.60

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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.