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Finding the Fourth Proportional to 66,347.70, 91,567.39 and 39,490.30

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Solution

The fourth proportional to 66,347.70, 91,567.39 and 39,490.30 is: 54,501.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,347.70 : 91,567.39 = 39,490.30 : x
  2. Step 2: Convert to fraction form
    66,347.70/91,567.39 = 39,490.30/x
  3. Step 3: Cross multiply
    66,347.70x = 91,567.39 × 39,490.30
  4. Step 4: Simplify right side
    66,347.70x = 3,616,023,373.67
  5. Step 5: Solve for x
    x = 3,616,023,373.67/66,347.70
  6. Step 6: Final answer
    x = 54,501.11

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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.