Home / 85,438.20-128,157.30-35,501.70

Finding the Fourth Proportional to 85,438.20, 128,157.30 and 35,501.70

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Solution

The fourth proportional to 85,438.20, 128,157.30 and 35,501.70 is: 53,252.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,438.20 : 128,157.30 = 35,501.70 : x
  2. Step 2: Convert to fraction form
    85,438.20/128,157.30 = 35,501.70/x
  3. Step 3: Cross multiply
    85,438.20x = 128,157.30 × 35,501.70
  4. Step 4: Simplify right side
    85,438.20x = 4,549,802,017.41
  5. Step 5: Solve for x
    x = 4,549,802,017.41/85,438.20
  6. Step 6: Final answer
    x = 53,252.55

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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.