Home / 101,036.06-139,405.38-65,218.40

Finding the Fourth Proportional to 101,036.06, 139,405.38 and 65,218.40

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Solution

The fourth proportional to 101,036.06, 139,405.38 and 65,218.40 is: 89,985.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,036.06 : 139,405.38 = 65,218.40 : x
  2. Step 2: Convert to fraction form
    101,036.06/139,405.38 = 65,218.40/x
  3. Step 3: Cross multiply
    101,036.06x = 139,405.38 × 65,218.40
  4. Step 4: Simplify right side
    101,036.06x = 9,091,795,834.99
  5. Step 5: Solve for x
    x = 9,091,795,834.99/101,036.06
  6. Step 6: Final answer
    x = 89,985.65

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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.