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Finding the Fourth Proportional to 66,429.60, 99,702.72 and 36,880.80

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Solution

The fourth proportional to 66,429.60, 99,702.72 and 36,880.80 is: 55,353.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429.60 : 99,702.72 = 36,880.80 : x
  2. Step 2: Convert to fraction form
    66,429.60/99,702.72 = 36,880.80/x
  3. Step 3: Cross multiply
    66,429.60x = 99,702.72 × 36,880.80
  4. Step 4: Simplify right side
    66,429.60x = 3,677,116,075.78
  5. Step 5: Solve for x
    x = 3,677,116,075.78/66,429.60
  6. Step 6: Final answer
    x = 55,353.58

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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.