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Finding the Fourth Proportional to 101,386.53, 139,847.54 and 65,030.43

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Solution

The fourth proportional to 101,386.53, 139,847.54 and 65,030.43 is: 89,699.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,386.53 : 139,847.54 = 65,030.43 : x
  2. Step 2: Convert to fraction form
    101,386.53/139,847.54 = 65,030.43/x
  3. Step 3: Cross multiply
    101,386.53x = 139,847.54 × 65,030.43
  4. Step 4: Simplify right side
    101,386.53x = 9,094,345,335.49
  5. Step 5: Solve for x
    x = 9,094,345,335.49/101,386.53
  6. Step 6: Final answer
    x = 89,699.74

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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.