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Finding the Fourth Proportional to 210,870.54, 316,305.81 and 53,111.30

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Solution

The fourth proportional to 210,870.54, 316,305.81 and 53,111.30 is: 79,666.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,870.54 : 316,305.81 = 53,111.30 : x
  2. Step 2: Convert to fraction form
    210,870.54/316,305.81 = 53,111.30/x
  3. Step 3: Cross multiply
    210,870.54x = 316,305.81 × 53,111.30
  4. Step 4: Simplify right side
    210,870.54x = 16,799,411,185.12
  5. Step 5: Solve for x
    x = 16,799,411,185.12/210,870.54
  6. Step 6: Final answer
    x = 79,666.94

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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.