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Finding the Fourth Proportional to 66,875.34, 92,289 and 40,018.98

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Solution

The fourth proportional to 66,875.34, 92,289 and 40,018.98 is: 55,226.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,875.34 : 92,289 = 40,018.98 : x
  2. Step 2: Convert to fraction form
    66,875.34/92,289 = 40,018.98/x
  3. Step 3: Cross multiply
    66,875.34x = 92,289 × 40,018.98
  4. Step 4: Simplify right side
    66,875.34x = 3,693,311,645.22
  5. Step 5: Solve for x
    x = 3,693,311,645.22/66,875.34
  6. Step 6: Final answer
    x = 55,226.81

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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.