Home / 90,709.74-136,064.88-31,545.72

Finding the Fourth Proportional to 90,709.74, 136,064.88 and 31,545.72

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Solution

The fourth proportional to 90,709.74, 136,064.88 and 31,545.72 is: 47,318.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,709.74 : 136,064.88 = 31,545.72 : x
  2. Step 2: Convert to fraction form
    90,709.74/136,064.88 = 31,545.72/x
  3. Step 3: Cross multiply
    90,709.74x = 136,064.88 × 31,545.72
  4. Step 4: Simplify right side
    90,709.74x = 4,292,264,606.31
  5. Step 5: Solve for x
    x = 4,292,264,606.31/90,709.74
  6. Step 6: Final answer
    x = 47,318.67

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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.