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Finding the Fourth Proportional to 101,407.56, 139,895.88 and 65,609.10

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Solution

The fourth proportional to 101,407.56, 139,895.88 and 65,609.10 is: 90,510.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,407.56 : 139,895.88 = 65,609.10 : x
  2. Step 2: Convert to fraction form
    101,407.56/139,895.88 = 65,609.10/x
  3. Step 3: Cross multiply
    101,407.56x = 139,895.88 × 65,609.10
  4. Step 4: Simplify right side
    101,407.56x = 9,178,442,780.51
  5. Step 5: Solve for x
    x = 9,178,442,780.51/101,407.56
  6. Step 6: Final answer
    x = 90,510.44

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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.