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Finding the Fourth Proportional to 153,055.74, 211,206.66 and 85,068.30

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Solution

The fourth proportional to 153,055.74, 211,206.66 and 85,068.30 is: 117,388.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,055.74 : 211,206.66 = 85,068.30 : x
  2. Step 2: Convert to fraction form
    153,055.74/211,206.66 = 85,068.30/x
  3. Step 3: Cross multiply
    153,055.74x = 211,206.66 × 85,068.30
  4. Step 4: Simplify right side
    153,055.74x = 17,966,991,514.88
  5. Step 5: Solve for x
    x = 17,966,991,514.88/153,055.74
  6. Step 6: Final answer
    x = 117,388.55

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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.