Home / 211,409.16-291,742.45-115,915.69

Finding the Fourth Proportional to 211,409.16, 291,742.45 and 115,915.69

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Solution

The fourth proportional to 211,409.16, 291,742.45 and 115,915.69 is: 159,962.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,409.16 : 291,742.45 = 115,915.69 : x
  2. Step 2: Convert to fraction form
    211,409.16/291,742.45 = 115,915.69/x
  3. Step 3: Cross multiply
    211,409.16x = 291,742.45 × 115,915.69
  4. Step 4: Simplify right side
    211,409.16x = 33,817,527,394.04
  5. Step 5: Solve for x
    x = 33,817,527,394.04/211,409.16
  6. Step 6: Final answer
    x = 159,962.45

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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.