Home / 66,478.26-91,688.10-42,607.20

Finding the Fourth Proportional to 66,478.26, 91,688.10 and 42,607.20

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Solution

The fourth proportional to 66,478.26, 91,688.10 and 42,607.20 is: 58,764.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,478.26 : 91,688.10 = 42,607.20 : x
  2. Step 2: Convert to fraction form
    66,478.26/91,688.10 = 42,607.20/x
  3. Step 3: Cross multiply
    66,478.26x = 91,688.10 × 42,607.20
  4. Step 4: Simplify right side
    66,478.26x = 3,906,573,214.32
  5. Step 5: Solve for x
    x = 3,906,573,214.32/66,478.26
  6. Step 6: Final answer
    x = 58,764.67

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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.