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Finding the Fourth Proportional to 58,138.80, 87,013.80 and 51,140.40

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Solution

The fourth proportional to 58,138.80, 87,013.80 and 51,140.40 is: 76,539.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,138.80 : 87,013.80 = 51,140.40 : x
  2. Step 2: Convert to fraction form
    58,138.80/87,013.80 = 51,140.40/x
  3. Step 3: Cross multiply
    58,138.80x = 87,013.80 × 51,140.40
  4. Step 4: Simplify right side
    58,138.80x = 4,449,920,537.52
  5. Step 5: Solve for x
    x = 4,449,920,537.52/58,138.80
  6. Step 6: Final answer
    x = 76,539.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.