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Finding the Fourth Proportional to 66,290.51, 91,482.80 and 36,077.78

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Solution

The fourth proportional to 66,290.51, 91,482.80 and 36,077.78 is: 49,788.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,290.51 : 91,482.80 = 36,077.78 : x
  2. Step 2: Convert to fraction form
    66,290.51/91,482.80 = 36,077.78/x
  3. Step 3: Cross multiply
    66,290.51x = 91,482.80 × 36,077.78
  4. Step 4: Simplify right side
    66,290.51x = 3,300,495,694.38
  5. Step 5: Solve for x
    x = 3,300,495,694.38/66,290.51
  6. Step 6: Final answer
    x = 49,788.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.