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Finding the Fourth Proportional to 153,429.75, 211,733.09 and 89,779.77

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Solution

The fourth proportional to 153,429.75, 211,733.09 and 89,779.77 is: 123,896.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,429.75 : 211,733.09 = 89,779.77 : x
  2. Step 2: Convert to fraction form
    153,429.75/211,733.09 = 89,779.77/x
  3. Step 3: Cross multiply
    153,429.75x = 211,733.09 × 89,779.77
  4. Step 4: Simplify right side
    153,429.75x = 19,009,347,672.69
  5. Step 5: Solve for x
    x = 19,009,347,672.69/153,429.75
  6. Step 6: Final answer
    x = 123,896.10

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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.