Home / 90,667.20-136,000.80-89,792.40

Finding the Fourth Proportional to 90,667.20, 136,000.80 and 89,792.40

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Solution

The fourth proportional to 90,667.20, 136,000.80 and 89,792.40 is: 134,688.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,667.20 : 136,000.80 = 89,792.40 : x
  2. Step 2: Convert to fraction form
    90,667.20/136,000.80 = 89,792.40/x
  3. Step 3: Cross multiply
    90,667.20x = 136,000.80 × 89,792.40
  4. Step 4: Simplify right side
    90,667.20x = 12,211,838,233.92
  5. Step 5: Solve for x
    x = 12,211,838,233.92/90,667.20
  6. Step 6: Final answer
    x = 134,688.60

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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.