Home / 310,625.64-465,939.09-85,986.72

Finding the Fourth Proportional to 310,625.64, 465,939.09 and 85,986.72

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Solution

The fourth proportional to 310,625.64, 465,939.09 and 85,986.72 is: 128,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,625.64 : 465,939.09 = 85,986.72 : x
  2. Step 2: Convert to fraction form
    310,625.64/465,939.09 = 85,986.72/x
  3. Step 3: Cross multiply
    310,625.64x = 465,939.09 × 85,986.72
  4. Step 4: Simplify right side
    310,625.64x = 40,064,574,068.88
  5. Step 5: Solve for x
    x = 40,064,574,068.88/310,625.64
  6. Step 6: Final answer
    x = 128,980.25

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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.