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Finding the Fourth Proportional to 210,790.13, 316,161.90 and 53,018.64

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Solution

The fourth proportional to 210,790.13, 316,161.90 and 53,018.64 is: 79,522.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,790.13 : 316,161.90 = 53,018.64 : x
  2. Step 2: Convert to fraction form
    210,790.13/316,161.90 = 53,018.64/x
  3. Step 3: Cross multiply
    210,790.13x = 316,161.90 × 53,018.64
  4. Step 4: Simplify right side
    210,790.13x = 16,762,473,957.82
  5. Step 5: Solve for x
    x = 16,762,473,957.82/210,790.13
  6. Step 6: Final answer
    x = 79,522.10

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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.