Home / 105,679.28-145,703.16-75,500.72

Finding the Fourth Proportional to 105,679.28, 145,703.16 and 75,500.72

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Solution

The fourth proportional to 105,679.28, 145,703.16 and 75,500.72 is: 104,095.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,679.28 : 145,703.16 = 75,500.72 : x
  2. Step 2: Convert to fraction form
    105,679.28/145,703.16 = 75,500.72/x
  3. Step 3: Cross multiply
    105,679.28x = 145,703.16 × 75,500.72
  4. Step 4: Simplify right side
    105,679.28x = 11,000,693,486.28
  5. Step 5: Solve for x
    x = 11,000,693,486.28/105,679.28
  6. Step 6: Final answer
    x = 104,095.08

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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.