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Finding the Fourth Proportional to 66,699.54, 91,955.30 and 42,784.70

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Solution

The fourth proportional to 66,699.54, 91,955.30 and 42,784.70 is: 58,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,699.54 : 91,955.30 = 42,784.70 : x
  2. Step 2: Convert to fraction form
    66,699.54/91,955.30 = 42,784.70/x
  3. Step 3: Cross multiply
    66,699.54x = 91,955.30 × 42,784.70
  4. Step 4: Simplify right side
    66,699.54x = 3,934,279,250.21
  5. Step 5: Solve for x
    x = 3,934,279,250.21/66,699.54
  6. Step 6: Final answer
    x = 58,985.10

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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.