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Finding the Fourth Proportional to 104,280.88, 143,904 and 61,814.16

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Solution

The fourth proportional to 104,280.88, 143,904 and 61,814.16 is: 85,301.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,280.88 : 143,904 = 61,814.16 : x
  2. Step 2: Convert to fraction form
    104,280.88/143,904 = 61,814.16/x
  3. Step 3: Cross multiply
    104,280.88x = 143,904 × 61,814.16
  4. Step 4: Simplify right side
    104,280.88x = 8,895,304,880.64
  5. Step 5: Solve for x
    x = 8,895,304,880.64/104,280.88
  6. Step 6: Final answer
    x = 85,301.40

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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.