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Finding the Fourth Proportional to 60,902.40, 91,353.60 and 39,907.20

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Solution

The fourth proportional to 60,902.40, 91,353.60 and 39,907.20 is: 59,860.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,902.40 : 91,353.60 = 39,907.20 : x
  2. Step 2: Convert to fraction form
    60,902.40/91,353.60 = 39,907.20/x
  3. Step 3: Cross multiply
    60,902.40x = 91,353.60 × 39,907.20
  4. Step 4: Simplify right side
    60,902.40x = 3,645,666,385.92
  5. Step 5: Solve for x
    x = 3,645,666,385.92/60,902.40
  6. Step 6: Final answer
    x = 59,860.80

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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.