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Finding the Fourth Proportional to 353,378.72, 530,073.68 and 87,139.30

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Solution

The fourth proportional to 353,378.72, 530,073.68 and 87,139.30 is: 130,710.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,378.72 : 530,073.68 = 87,139.30 : x
  2. Step 2: Convert to fraction form
    353,378.72/530,073.68 = 87,139.30/x
  3. Step 3: Cross multiply
    353,378.72x = 530,073.68 × 87,139.30
  4. Step 4: Simplify right side
    353,378.72x = 46,190,249,423.62
  5. Step 5: Solve for x
    x = 46,190,249,423.62/353,378.72
  6. Step 6: Final answer
    x = 130,710.33

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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.