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Finding the Fourth Proportional to 66,045.60, 99,200.16 and 39,801.60

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Solution

The fourth proportional to 66,045.60, 99,200.16 and 39,801.60 is: 59,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,045.60 : 99,200.16 = 39,801.60 : x
  2. Step 2: Convert to fraction form
    66,045.60/99,200.16 = 39,801.60/x
  3. Step 3: Cross multiply
    66,045.60x = 99,200.16 × 39,801.60
  4. Step 4: Simplify right side
    66,045.60x = 3,948,325,088.26
  5. Step 5: Solve for x
    x = 3,948,325,088.26/66,045.60
  6. Step 6: Final answer
    x = 59,781.80

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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.