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Finding the Fourth Proportional to 53,303.79, 79,957.74 and 13,859.88

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Solution

The fourth proportional to 53,303.79, 79,957.74 and 13,859.88 is: 20,790.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,303.79 : 79,957.74 = 13,859.88 : x
  2. Step 2: Convert to fraction form
    53,303.79/79,957.74 = 13,859.88/x
  3. Step 3: Cross multiply
    53,303.79x = 79,957.74 × 13,859.88
  4. Step 4: Simplify right side
    53,303.79x = 1,108,204,681.47
  5. Step 5: Solve for x
    x = 1,108,204,681.47/53,303.79
  6. Step 6: Final answer
    x = 20,790.35

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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.