Home / 90,688.20-136,032.30-89,813.40

Finding the Fourth Proportional to 90,688.20, 136,032.30 and 89,813.40

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Solution

The fourth proportional to 90,688.20, 136,032.30 and 89,813.40 is: 134,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,688.20 : 136,032.30 = 89,813.40 : x
  2. Step 2: Convert to fraction form
    90,688.20/136,032.30 = 89,813.40/x
  3. Step 3: Cross multiply
    90,688.20x = 136,032.30 × 89,813.40
  4. Step 4: Simplify right side
    90,688.20x = 12,217,523,372.82
  5. Step 5: Solve for x
    x = 12,217,523,372.82/90,688.20
  6. Step 6: Final answer
    x = 134,720.10

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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.