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Finding the Fourth Proportional to 56,178.93, 84,280.95 and 21,118.89

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Solution

The fourth proportional to 56,178.93, 84,280.95 and 21,118.89 is: 31,683.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,178.93 : 84,280.95 = 21,118.89 : x
  2. Step 2: Convert to fraction form
    56,178.93/84,280.95 = 21,118.89/x
  3. Step 3: Cross multiply
    56,178.93x = 84,280.95 × 21,118.89
  4. Step 4: Simplify right side
    56,178.93x = 1,779,920,112.15
  5. Step 5: Solve for x
    x = 1,779,920,112.15/56,178.93
  6. Step 6: Final answer
    x = 31,683.05

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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.