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Finding the Fourth Proportional to 66,430.63, 91,622.43 and 42,559.53

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Solution

The fourth proportional to 66,430.63, 91,622.43 and 42,559.53 is: 58,698.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,430.63 : 91,622.43 = 42,559.53 : x
  2. Step 2: Convert to fraction form
    66,430.63/91,622.43 = 42,559.53/x
  3. Step 3: Cross multiply
    66,430.63x = 91,622.43 × 42,559.53
  4. Step 4: Simplify right side
    66,430.63x = 3,899,407,558.26
  5. Step 5: Solve for x
    x = 3,899,407,558.26/66,430.63
  6. Step 6: Final answer
    x = 58,698.94

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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.