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Finding the Fourth Proportional to 101,383.53, 139,862.78 and 65,585.07

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Solution

The fourth proportional to 101,383.53, 139,862.78 and 65,585.07 is: 90,477.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,383.53 : 139,862.78 = 65,585.07 : x
  2. Step 2: Convert to fraction form
    101,383.53/139,862.78 = 65,585.07/x
  3. Step 3: Cross multiply
    101,383.53x = 139,862.78 × 65,585.07
  4. Step 4: Simplify right side
    101,383.53x = 9,172,909,888.77
  5. Step 5: Solve for x
    x = 9,172,909,888.77/101,383.53
  6. Step 6: Final answer
    x = 90,477.32

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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.