Home / 85,614.40-128,390.01-29,439.55

Finding the Fourth Proportional to 85,614.40, 128,390.01 and 29,439.55

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Solution

The fourth proportional to 85,614.40, 128,390.01 and 29,439.55 is: 44,148.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,614.40 : 128,390.01 = 29,439.55 : x
  2. Step 2: Convert to fraction form
    85,614.40/128,390.01 = 29,439.55/x
  3. Step 3: Cross multiply
    85,614.40x = 128,390.01 × 29,439.55
  4. Step 4: Simplify right side
    85,614.40x = 3,779,744,118.90
  5. Step 5: Solve for x
    x = 3,779,744,118.90/85,614.40
  6. Step 6: Final answer
    x = 44,148.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.