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Finding the Fourth Proportional to 353,379.72, 530,075.18 and 87,140.30

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Solution

The fourth proportional to 353,379.72, 530,075.18 and 87,140.30 is: 130,711.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,379.72 : 530,075.18 = 87,140.30 : x
  2. Step 2: Convert to fraction form
    353,379.72/530,075.18 = 87,140.30/x
  3. Step 3: Cross multiply
    353,379.72x = 530,075.18 × 87,140.30
  4. Step 4: Simplify right side
    353,379.72x = 46,190,910,207.75
  5. Step 5: Solve for x
    x = 46,190,910,207.75/353,379.72
  6. Step 6: Final answer
    x = 130,711.83

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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.