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Finding the Fourth Proportional to 66,210.80, 91,309.01 and 51,079.59

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Solution

The fourth proportional to 66,210.80, 91,309.01 and 51,079.59 is: 70,442.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,210.80 : 91,309.01 = 51,079.59 : x
  2. Step 2: Convert to fraction form
    66,210.80/91,309.01 = 51,079.59/x
  3. Step 3: Cross multiply
    66,210.80x = 91,309.01 × 51,079.59
  4. Step 4: Simplify right side
    66,210.80x = 4,664,026,538.71
  5. Step 5: Solve for x
    x = 4,664,026,538.71/66,210.80
  6. Step 6: Final answer
    x = 70,442.09

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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.