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Finding the Fourth Proportional to 153,303, 211,558.08 and 86,235

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Solution

The fourth proportional to 153,303, 211,558.08 and 86,235 is: 119,004.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,303 : 211,558.08 = 86,235 : x
  2. Step 2: Convert to fraction form
    153,303/211,558.08 = 86,235/x
  3. Step 3: Cross multiply
    153,303x = 211,558.08 × 86,235
  4. Step 4: Simplify right side
    153,303x = 18,243,711,028.80
  5. Step 5: Solve for x
    x = 18,243,711,028.80/153,303
  6. Step 6: Final answer
    x = 119,004.27

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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.