Home / 287,123.06-430,651.73-76,777.40

Finding the Fourth Proportional to 287,123.06, 430,651.73 and 76,777.40

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Solution

The fourth proportional to 287,123.06, 430,651.73 and 76,777.40 is: 115,157.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,123.06 : 430,651.73 = 76,777.40 : x
  2. Step 2: Convert to fraction form
    287,123.06/430,651.73 = 76,777.40/x
  3. Step 3: Cross multiply
    287,123.06x = 430,651.73 × 76,777.40
  4. Step 4: Simplify right side
    287,123.06x = 33,064,320,827.64
  5. Step 5: Solve for x
    x = 33,064,320,827.64/287,123.06
  6. Step 6: Final answer
    x = 115,157.31

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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.