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Finding the Fourth Proportional to 210,506.16, 315,984.02 and 90,622.45

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Solution

The fourth proportional to 210,506.16, 315,984.02 and 90,622.45 is: 136,030.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,506.16 : 315,984.02 = 90,622.45 : x
  2. Step 2: Convert to fraction form
    210,506.16/315,984.02 = 90,622.45/x
  3. Step 3: Cross multiply
    210,506.16x = 315,984.02 × 90,622.45
  4. Step 4: Simplify right side
    210,506.16x = 28,635,246,053.25
  5. Step 5: Solve for x
    x = 28,635,246,053.25/210,506.16
  6. Step 6: Final answer
    x = 136,030.44

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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.