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Finding the Fourth Proportional to 61,872.16, 85,383.12 and 48,457.12

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Solution

The fourth proportional to 61,872.16, 85,383.12 and 48,457.12 is: 66,870.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,872.16 : 85,383.12 = 48,457.12 : x
  2. Step 2: Convert to fraction form
    61,872.16/85,383.12 = 48,457.12/x
  3. Step 3: Cross multiply
    61,872.16x = 85,383.12 × 48,457.12
  4. Step 4: Simplify right side
    61,872.16x = 4,137,420,091.81
  5. Step 5: Solve for x
    x = 4,137,420,091.81/61,872.16
  6. Step 6: Final answer
    x = 66,870.46

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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.