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Finding the Fourth Proportional to 153,876.41, 212,384.87 and 90,234.71

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Solution

The fourth proportional to 153,876.41, 212,384.87 and 90,234.71 is: 124,544.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,876.41 : 212,384.87 = 90,234.71 : x
  2. Step 2: Convert to fraction form
    153,876.41/212,384.87 = 90,234.71/x
  3. Step 3: Cross multiply
    153,876.41x = 212,384.87 × 90,234.71
  4. Step 4: Simplify right side
    153,876.41x = 19,164,486,774.56
  5. Step 5: Solve for x
    x = 19,164,486,774.56/153,876.41
  6. Step 6: Final answer
    x = 124,544.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.