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Finding the Fourth Proportional to 90,130.88, 135,212.48 and 30,951.20

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Solution

The fourth proportional to 90,130.88, 135,212.48 and 30,951.20 is: 46,432.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,130.88 : 135,212.48 = 30,951.20 : x
  2. Step 2: Convert to fraction form
    90,130.88/135,212.48 = 30,951.20/x
  3. Step 3: Cross multiply
    90,130.88x = 135,212.48 × 30,951.20
  4. Step 4: Simplify right side
    90,130.88x = 4,184,988,510.98
  5. Step 5: Solve for x
    x = 4,184,988,510.98/90,130.88
  6. Step 6: Final answer
    x = 46,432.35

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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.