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Finding the Fourth Proportional to 66,590.35, 91,870.77 and 39,360.70

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Solution

The fourth proportional to 66,590.35, 91,870.77 and 39,360.70 is: 54,303.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,590.35 : 91,870.77 = 39,360.70 : x
  2. Step 2: Convert to fraction form
    66,590.35/91,870.77 = 39,360.70/x
  3. Step 3: Cross multiply
    66,590.35x = 91,870.77 × 39,360.70
  4. Step 4: Simplify right side
    66,590.35x = 3,616,097,816.74
  5. Step 5: Solve for x
    x = 3,616,097,816.74/66,590.35
  6. Step 6: Final answer
    x = 54,303.63

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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.