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Finding the Fourth Proportional to 101,907.40, 153,006.90 and 72,455.80

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Solution

The fourth proportional to 101,907.40, 153,006.90 and 72,455.80 is: 108,787.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,907.40 : 153,006.90 = 72,455.80 : x
  2. Step 2: Convert to fraction form
    101,907.40/153,006.90 = 72,455.80/x
  3. Step 3: Cross multiply
    101,907.40x = 153,006.90 × 72,455.80
  4. Step 4: Simplify right side
    101,907.40x = 11,086,237,345.02
  5. Step 5: Solve for x
    x = 11,086,237,345.02/101,907.40
  6. Step 6: Final answer
    x = 108,787.36

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1.5x scale

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.