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Finding the Fourth Proportional to 105,425.52, 145,487.12 and 57,678.90

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Solution

The fourth proportional to 105,425.52, 145,487.12 and 57,678.90 is: 79,596.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,425.52 : 145,487.12 = 57,678.90 : x
  2. Step 2: Convert to fraction form
    105,425.52/145,487.12 = 57,678.90/x
  3. Step 3: Cross multiply
    105,425.52x = 145,487.12 × 57,678.90
  4. Step 4: Simplify right side
    105,425.52x = 8,391,537,045.77
  5. Step 5: Solve for x
    x = 8,391,537,045.77/105,425.52
  6. Step 6: Final answer
    x = 79,596.83

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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.