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Finding the Fourth Proportional to 57,007.58, 78,669.88 and 31,857.08

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Solution

The fourth proportional to 57,007.58, 78,669.88 and 31,857.08 is: 43,962.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,007.58 : 78,669.88 = 31,857.08 : x
  2. Step 2: Convert to fraction form
    57,007.58/78,669.88 = 31,857.08/x
  3. Step 3: Cross multiply
    57,007.58x = 78,669.88 × 31,857.08
  4. Step 4: Simplify right side
    57,007.58x = 2,506,192,660.75
  5. Step 5: Solve for x
    x = 2,506,192,660.75/57,007.58
  6. Step 6: Final answer
    x = 43,962.45

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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.