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Finding the Fourth Proportional to 356,135.72, 534,203.60 and 145,688

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Solution

The fourth proportional to 356,135.72, 534,203.60 and 145,688 is: 218,532.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,135.72 : 534,203.60 = 145,688 : x
  2. Step 2: Convert to fraction form
    356,135.72/534,203.60 = 145,688/x
  3. Step 3: Cross multiply
    356,135.72x = 534,203.60 × 145,688
  4. Step 4: Simplify right side
    356,135.72x = 77,827,054,076.80
  5. Step 5: Solve for x
    x = 77,827,054,076.80/356,135.72
  6. Step 6: Final answer
    x = 218,532.01

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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.