Home / 287,116.81-430,642.41-76,771.15

Finding the Fourth Proportional to 287,116.81, 430,642.41 and 76,771.15

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Solution

The fourth proportional to 287,116.81, 430,642.41 and 76,771.15 is: 115,147.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,116.81 : 430,642.41 = 76,771.15 : x
  2. Step 2: Convert to fraction form
    287,116.81/430,642.41 = 76,771.15/x
  3. Step 3: Cross multiply
    287,116.81x = 430,642.41 × 76,771.15
  4. Step 4: Simplify right side
    287,116.81x = 33,060,913,054.47
  5. Step 5: Solve for x
    x = 33,060,913,054.47/287,116.81
  6. Step 6: Final answer
    x = 115,147.95

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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.