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Finding the Fourth Proportional to 58,152, 87,239.28 and 18,709.68

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Solution

The fourth proportional to 58,152, 87,239.28 and 18,709.68 is: 28,068.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,152 : 87,239.28 = 18,709.68 : x
  2. Step 2: Convert to fraction form
    58,152/87,239.28 = 18,709.68/x
  3. Step 3: Cross multiply
    58,152x = 87,239.28 × 18,709.68
  4. Step 4: Simplify right side
    58,152x = 1,632,219,012.23
  5. Step 5: Solve for x
    x = 1,632,219,012.23/58,152
  6. Step 6: Final answer
    x = 28,068.15

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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.