Home / 105,677.28-145,700.40-75,498.72

Finding the Fourth Proportional to 105,677.28, 145,700.40 and 75,498.72

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Solution

The fourth proportional to 105,677.28, 145,700.40 and 75,498.72 is: 104,092.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,677.28 : 145,700.40 = 75,498.72 : x
  2. Step 2: Convert to fraction form
    105,677.28/145,700.40 = 75,498.72/x
  3. Step 3: Cross multiply
    105,677.28x = 145,700.40 × 75,498.72
  4. Step 4: Simplify right side
    105,677.28x = 11,000,193,703.49
  5. Step 5: Solve for x
    x = 11,000,193,703.49/105,677.28
  6. Step 6: Final answer
    x = 104,092.32

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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.