Home / 211,521.60-317,397.60-86,875.20

Finding the Fourth Proportional to 211,521.60, 317,397.60 and 86,875.20

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Solution

The fourth proportional to 211,521.60, 317,397.60 and 86,875.20 is: 130,360.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,521.60 : 317,397.60 = 86,875.20 : x
  2. Step 2: Convert to fraction form
    211,521.60/317,397.60 = 86,875.20/x
  3. Step 3: Cross multiply
    211,521.60x = 317,397.60 × 86,875.20
  4. Step 4: Simplify right side
    211,521.60x = 27,573,979,979.52
  5. Step 5: Solve for x
    x = 27,573,979,979.52/211,521.60
  6. Step 6: Final answer
    x = 130,360.11

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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.