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Finding the Fourth Proportional to 58,153.68, 87,212.16 and 18,702

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Solution

The fourth proportional to 58,153.68, 87,212.16 and 18,702 is: 28,047.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,153.68 : 87,212.16 = 18,702 : x
  2. Step 2: Convert to fraction form
    58,153.68/87,212.16 = 18,702/x
  3. Step 3: Cross multiply
    58,153.68x = 87,212.16 × 18,702
  4. Step 4: Simplify right side
    58,153.68x = 1,631,041,816.32
  5. Step 5: Solve for x
    x = 1,631,041,816.32/58,153.68
  6. Step 6: Final answer
    x = 28,047.10

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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.