Home / 99,386.88-137,156.40-56,959.20

Finding the Fourth Proportional to 99,386.88, 137,156.40 and 56,959.20

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Solution

The fourth proportional to 99,386.88, 137,156.40 and 56,959.20 is: 78,605.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,386.88 : 137,156.40 = 56,959.20 : x
  2. Step 2: Convert to fraction form
    99,386.88/137,156.40 = 56,959.20/x
  3. Step 3: Cross multiply
    99,386.88x = 137,156.40 × 56,959.20
  4. Step 4: Simplify right side
    99,386.88x = 7,812,318,818.88
  5. Step 5: Solve for x
    x = 7,812,318,818.88/99,386.88
  6. Step 6: Final answer
    x = 78,605.13

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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.