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Finding the Fourth Proportional to 99,573.84, 137,410.80 and 57,139.02

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Solution

The fourth proportional to 99,573.84, 137,410.80 and 57,139.02 is: 78,851.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,573.84 : 137,410.80 = 57,139.02 : x
  2. Step 2: Convert to fraction form
    99,573.84/137,410.80 = 57,139.02/x
  3. Step 3: Cross multiply
    99,573.84x = 137,410.80 × 57,139.02
  4. Step 4: Simplify right side
    99,573.84x = 7,851,518,449.42
  5. Step 5: Solve for x
    x = 7,851,518,449.42/99,573.84
  6. Step 6: Final answer
    x = 78,851.22

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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.