Home / 101,128.06-139,497.80-64,816.57

Finding the Fourth Proportional to 101,128.06, 139,497.80 and 64,816.57

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Solution

The fourth proportional to 101,128.06, 139,497.80 and 64,816.57 is: 89,409.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,128.06 : 139,497.80 = 64,816.57 : x
  2. Step 2: Convert to fraction form
    101,128.06/139,497.80 = 64,816.57/x
  3. Step 3: Cross multiply
    101,128.06x = 139,497.80 × 64,816.57
  4. Step 4: Simplify right side
    101,128.06x = 9,041,768,768.84
  5. Step 5: Solve for x
    x = 9,041,768,768.84/101,128.06
  6. Step 6: Final answer
    x = 89,409.10

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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.