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Finding the Fourth Proportional to 45,656.64, 68,483.75 and 20,678.67

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Solution

The fourth proportional to 45,656.64, 68,483.75 and 20,678.67 is: 31,017.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,656.64 : 68,483.75 = 20,678.67 : x
  2. Step 2: Convert to fraction form
    45,656.64/68,483.75 = 20,678.67/x
  3. Step 3: Cross multiply
    45,656.64x = 68,483.75 × 20,678.67
  4. Step 4: Simplify right side
    45,656.64x = 1,416,152,763.22
  5. Step 5: Solve for x
    x = 1,416,152,763.22/45,656.64
  6. Step 6: Final answer
    x = 31,017.45

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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.