Home / 105,091.20-145,029.35-57,347.16

Finding the Fourth Proportional to 105,091.20, 145,029.35 and 57,347.16

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Solution

The fourth proportional to 105,091.20, 145,029.35 and 57,347.16 is: 79,140.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,091.20 : 145,029.35 = 57,347.16 : x
  2. Step 2: Convert to fraction form
    105,091.20/145,029.35 = 57,347.16/x
  3. Step 3: Cross multiply
    105,091.20x = 145,029.35 × 57,347.16
  4. Step 4: Simplify right side
    105,091.20x = 8,317,021,339.15
  5. Step 5: Solve for x
    x = 8,317,021,339.15/105,091.20
  6. Step 6: Final answer
    x = 79,140.99

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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.