Home / 105,439.68-145,508.58-57,697.20

Finding the Fourth Proportional to 105,439.68, 145,508.58 and 57,697.20

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Solution

The fourth proportional to 105,439.68, 145,508.58 and 57,697.20 is: 79,623.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,439.68 : 145,508.58 = 57,697.20 : x
  2. Step 2: Convert to fraction form
    105,439.68/145,508.58 = 57,697.20/x
  3. Step 3: Cross multiply
    105,439.68x = 145,508.58 × 57,697.20
  4. Step 4: Simplify right side
    105,439.68x = 8,395,437,641.98
  5. Step 5: Solve for x
    x = 8,395,437,641.98/105,439.68
  6. Step 6: Final answer
    x = 79,623.13

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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.