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Finding the Fourth Proportional to 61,159.80, 91,739.70 and 51,828.60

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Solution

The fourth proportional to 61,159.80, 91,739.70 and 51,828.60 is: 77,742.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,159.80 : 91,739.70 = 51,828.60 : x
  2. Step 2: Convert to fraction form
    61,159.80/91,739.70 = 51,828.60/x
  3. Step 3: Cross multiply
    61,159.80x = 91,739.70 × 51,828.60
  4. Step 4: Simplify right side
    61,159.80x = 4,754,740,215.42
  5. Step 5: Solve for x
    x = 4,754,740,215.42/61,159.80
  6. Step 6: Final answer
    x = 77,742.90

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1.5x scale

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.