Home / 211,347.81-317,159.10-91,521.75

Finding the Fourth Proportional to 211,347.81, 317,159.10 and 91,521.75

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Solution

The fourth proportional to 211,347.81, 317,159.10 and 91,521.75 is: 137,342.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,347.81 : 317,159.10 = 91,521.75 : x
  2. Step 2: Convert to fraction form
    211,347.81/317,159.10 = 91,521.75/x
  3. Step 3: Cross multiply
    211,347.81x = 317,159.10 × 91,521.75
  4. Step 4: Simplify right side
    211,347.81x = 29,026,955,860.43
  5. Step 5: Solve for x
    x = 29,026,955,860.43/211,347.81
  6. Step 6: Final answer
    x = 137,342.12

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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.