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Finding the Fourth Proportional to 66,490, 99,756.60 and 46,520.08

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Solution

The fourth proportional to 66,490, 99,756.60 and 46,520.08 is: 69,795.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,490 : 99,756.60 = 46,520.08 : x
  2. Step 2: Convert to fraction form
    66,490/99,756.60 = 46,520.08/x
  3. Step 3: Cross multiply
    66,490x = 99,756.60 × 46,520.08
  4. Step 4: Simplify right side
    66,490x = 4,640,685,012.53
  5. Step 5: Solve for x
    x = 4,640,685,012.53/66,490
  6. Step 6: Final answer
    x = 69,795.23

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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.