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Finding the Fourth Proportional to 66,276.80, 99,415.20 and 48,780.80

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Solution

The fourth proportional to 66,276.80, 99,415.20 and 48,780.80 is: 73,171.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,276.80 : 99,415.20 = 48,780.80 : x
  2. Step 2: Convert to fraction form
    66,276.80/99,415.20 = 48,780.80/x
  3. Step 3: Cross multiply
    66,276.80x = 99,415.20 × 48,780.80
  4. Step 4: Simplify right side
    66,276.80x = 4,849,552,988.16
  5. Step 5: Solve for x
    x = 4,849,552,988.16/66,276.80
  6. Step 6: Final answer
    x = 73,171.20

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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.