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Finding the Fourth Proportional to 101,130.36, 139,480.95 and 64,835.20

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Solution

The fourth proportional to 101,130.36, 139,480.95 and 64,835.20 is: 89,421.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,130.36 : 139,480.95 = 64,835.20 : x
  2. Step 2: Convert to fraction form
    101,130.36/139,480.95 = 64,835.20/x
  3. Step 3: Cross multiply
    101,130.36x = 139,480.95 × 64,835.20
  4. Step 4: Simplify right side
    101,130.36x = 9,043,275,289.44
  5. Step 5: Solve for x
    x = 9,043,275,289.44/101,130.36
  6. Step 6: Final answer
    x = 89,421.96

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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.