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Finding the Fourth Proportional to 56,988.78, 85,430.89 and 21,902.01

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Solution

The fourth proportional to 56,988.78, 85,430.89 and 21,902.01 is: 32,832.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,988.78 : 85,430.89 = 21,902.01 : x
  2. Step 2: Convert to fraction form
    56,988.78/85,430.89 = 21,902.01/x
  3. Step 3: Cross multiply
    56,988.78x = 85,430.89 × 21,902.01
  4. Step 4: Simplify right side
    56,988.78x = 1,871,108,207.09
  5. Step 5: Solve for x
    x = 1,871,108,207.09/56,988.78
  6. Step 6: Final answer
    x = 32,832.92

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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.