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Finding the Fourth Proportional to 66,302.69, 91,490.21 and 39,077.00

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Solution

The fourth proportional to 66,302.69, 91,490.21 and 39,077.00 is: 53,921.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,302.69 : 91,490.21 = 39,077.00 : x
  2. Step 2: Convert to fraction form
    66,302.69/91,490.21 = 39,077.00/x
  3. Step 3: Cross multiply
    66,302.69x = 91,490.21 × 39,077.00
  4. Step 4: Simplify right side
    66,302.69x = 3,575,162,478.72
  5. Step 5: Solve for x
    x = 3,575,162,478.72/66,302.69
  6. Step 6: Final answer
    x = 53,921.84

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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.