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Finding the Fourth Proportional to 99,907.86, 137,868.57 and 54,585.12

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Solution

The fourth proportional to 99,907.86, 137,868.57 and 54,585.12 is: 75,325.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,907.86 : 137,868.57 = 54,585.12 : x
  2. Step 2: Convert to fraction form
    99,907.86/137,868.57 = 54,585.12/x
  3. Step 3: Cross multiply
    99,907.86x = 137,868.57 × 54,585.12
  4. Step 4: Simplify right side
    99,907.86x = 7,525,572,437.68
  5. Step 5: Solve for x
    x = 7,525,572,437.68/99,907.86
  6. Step 6: Final answer
    x = 75,325.13

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1.5x scale

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.