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Finding the Fourth Proportional to 66,710.36, 100,070.74 and 19,326.13

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Solution

The fourth proportional to 66,710.36, 100,070.74 and 19,326.13 is: 28,990.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,710.36 : 100,070.74 = 19,326.13 : x
  2. Step 2: Convert to fraction form
    66,710.36/100,070.74 = 19,326.13/x
  3. Step 3: Cross multiply
    66,710.36x = 100,070.74 × 19,326.13
  4. Step 4: Simplify right side
    66,710.36x = 1,933,980,358.61
  5. Step 5: Solve for x
    x = 1,933,980,358.61/66,710.36
  6. Step 6: Final answer
    x = 28,990.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.