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Finding the Fourth Proportional to 57,018.90, 85,530.12 and 19,578.48

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Solution

The fourth proportional to 57,018.90, 85,530.12 and 19,578.48 is: 29,368.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,018.90 : 85,530.12 = 19,578.48 : x
  2. Step 2: Convert to fraction form
    57,018.90/85,530.12 = 19,578.48/x
  3. Step 3: Cross multiply
    57,018.90x = 85,530.12 × 19,578.48
  4. Step 4: Simplify right side
    57,018.90x = 1,674,549,743.82
  5. Step 5: Solve for x
    x = 1,674,549,743.82/57,018.90
  6. Step 6: Final answer
    x = 29,368.33

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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.