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Finding the Fourth Proportional to 66,697.04, 91,951.84 and 42,782.20

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Solution

The fourth proportional to 66,697.04, 91,951.84 and 42,782.20 is: 58,981.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,697.04 : 91,951.84 = 42,782.20 : x
  2. Step 2: Convert to fraction form
    66,697.04/91,951.84 = 42,782.20/x
  3. Step 3: Cross multiply
    66,697.04x = 91,951.84 × 42,782.20
  4. Step 4: Simplify right side
    66,697.04x = 3,933,902,009.25
  5. Step 5: Solve for x
    x = 3,933,902,009.25/66,697.04
  6. Step 6: Final answer
    x = 58,981.66

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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.