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Finding the Fourth Proportional to 56,573.61, 84,871.34 and 19,139.77

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Solution

The fourth proportional to 56,573.61, 84,871.34 and 19,139.77 is: 28,713.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,573.61 : 84,871.34 = 19,139.77 : x
  2. Step 2: Convert to fraction form
    56,573.61/84,871.34 = 19,139.77/x
  3. Step 3: Cross multiply
    56,573.61x = 84,871.34 × 19,139.77
  4. Step 4: Simplify right side
    56,573.61x = 1,624,417,927.19
  5. Step 5: Solve for x
    x = 1,624,417,927.19/56,573.61
  6. Step 6: Final answer
    x = 28,713.35

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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.