Home / 105,731.28-145,911.05-57,984.21

Finding the Fourth Proportional to 105,731.28, 145,911.05 and 57,984.21

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Solution

The fourth proportional to 105,731.28, 145,911.05 and 57,984.21 is: 80,019.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,731.28 : 145,911.05 = 57,984.21 : x
  2. Step 2: Convert to fraction form
    105,731.28/145,911.05 = 57,984.21/x
  3. Step 3: Cross multiply
    105,731.28x = 145,911.05 × 57,984.21
  4. Step 4: Simplify right side
    105,731.28x = 8,460,536,674.60
  5. Step 5: Solve for x
    x = 8,460,536,674.60/105,731.28
  6. Step 6: Final answer
    x = 80,019.24

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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.