Home / 57,020-78,690.03-31,869.50

Finding the Fourth Proportional to 57,020, 78,690.03 and 31,869.50

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Solution

The fourth proportional to 57,020, 78,690.03 and 31,869.50 is: 43,981.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,020 : 78,690.03 = 31,869.50 : x
  2. Step 2: Convert to fraction form
    57,020/78,690.03 = 31,869.50/x
  3. Step 3: Cross multiply
    57,020x = 78,690.03 × 31,869.50
  4. Step 4: Simplify right side
    57,020x = 2,507,811,911.09
  5. Step 5: Solve for x
    x = 2,507,811,911.09/57,020
  6. Step 6: Final answer
    x = 43,981.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.