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Finding the Fourth Proportional to 105,323.55, 145,346.55 and 57,576.90

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Solution

The fourth proportional to 105,323.55, 145,346.55 and 57,576.90 is: 79,456.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,323.55 : 145,346.55 = 57,576.90 : x
  2. Step 2: Convert to fraction form
    105,323.55/145,346.55 = 57,576.90/x
  3. Step 3: Cross multiply
    105,323.55x = 145,346.55 × 57,576.90
  4. Step 4: Simplify right side
    105,323.55x = 8,368,603,774.70
  5. Step 5: Solve for x
    x = 8,368,603,774.70/105,323.55
  6. Step 6: Final answer
    x = 79,456.15

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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.