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Finding the Fourth Proportional to 153,385.50, 211,671.99 and 86,318.94

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Solution

The fourth proportional to 153,385.50, 211,671.99 and 86,318.94 is: 119,120.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,385.50 : 211,671.99 = 86,318.94 : x
  2. Step 2: Convert to fraction form
    153,385.50/211,671.99 = 86,318.94/x
  3. Step 3: Cross multiply
    153,385.50x = 211,671.99 × 86,318.94
  4. Step 4: Simplify right side
    153,385.50x = 18,271,301,804.49
  5. Step 5: Solve for x
    x = 18,271,301,804.49/153,385.50
  6. Step 6: Final answer
    x = 119,120.14

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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.