Home / 90,903.40-136,355.10-28,573.90

Finding the Fourth Proportional to 90,903.40, 136,355.10 and 28,573.90

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Solution

The fourth proportional to 90,903.40, 136,355.10 and 28,573.90 is: 42,860.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,903.40 : 136,355.10 = 28,573.90 : x
  2. Step 2: Convert to fraction form
    90,903.40/136,355.10 = 28,573.90/x
  3. Step 3: Cross multiply
    90,903.40x = 136,355.10 × 28,573.90
  4. Step 4: Simplify right side
    90,903.40x = 3,896,196,991.89
  5. Step 5: Solve for x
    x = 3,896,196,991.89/90,903.40
  6. Step 6: Final answer
    x = 42,860.85

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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.