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Finding the Fourth Proportional to 315,336.85, 473,085.16 and 90,692.46

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Solution

The fourth proportional to 315,336.85, 473,085.16 and 90,692.46 is: 136,061.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,336.85 : 473,085.16 = 90,692.46 : x
  2. Step 2: Convert to fraction form
    315,336.85/473,085.16 = 90,692.46/x
  3. Step 3: Cross multiply
    315,336.85x = 473,085.16 × 90,692.46
  4. Step 4: Simplify right side
    315,336.85x = 42,905,256,723.16
  5. Step 5: Solve for x
    x = 42,905,256,723.16/315,336.85
  6. Step 6: Final answer
    x = 136,061.67

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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.