Home / 105,174.28-145,143.78-64,889.74

Finding the Fourth Proportional to 105,174.28, 145,143.78 and 64,889.74

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Solution

The fourth proportional to 105,174.28, 145,143.78 and 64,889.74 is: 89,549.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,174.28 : 145,143.78 = 64,889.74 : x
  2. Step 2: Convert to fraction form
    105,174.28/145,143.78 = 64,889.74/x
  3. Step 3: Cross multiply
    105,174.28x = 145,143.78 × 64,889.74
  4. Step 4: Simplify right side
    105,174.28x = 9,418,341,421.10
  5. Step 5: Solve for x
    x = 9,418,341,421.10/105,174.28
  6. Step 6: Final answer
    x = 89,549.86

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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.