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Finding the Fourth Proportional to 66,479.47, 99,723.72 and 19,090.92

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Solution

The fourth proportional to 66,479.47, 99,723.72 and 19,090.92 is: 28,637.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,479.47 : 99,723.72 = 19,090.92 : x
  2. Step 2: Convert to fraction form
    66,479.47/99,723.72 = 19,090.92/x
  3. Step 3: Cross multiply
    66,479.47x = 99,723.72 × 19,090.92
  4. Step 4: Simplify right side
    66,479.47x = 1,903,818,006.18
  5. Step 5: Solve for x
    x = 1,903,818,006.18/66,479.47
  6. Step 6: Final answer
    x = 28,637.68

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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.