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Finding the Fourth Proportional to 66,061.80, 99,115.74 and 28,130.28

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Solution

The fourth proportional to 66,061.80, 99,115.74 and 28,130.28 is: 42,205.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,061.80 : 99,115.74 = 28,130.28 : x
  2. Step 2: Convert to fraction form
    66,061.80/99,115.74 = 28,130.28/x
  3. Step 3: Cross multiply
    66,061.80x = 99,115.74 × 28,130.28
  4. Step 4: Simplify right side
    66,061.80x = 2,788,153,518.61
  5. Step 5: Solve for x
    x = 2,788,153,518.61/66,061.80
  6. Step 6: Final answer
    x = 42,205.23

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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.