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Finding the Fourth Proportional to 155,460, 214,534.80 and 88,392

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Solution

The fourth proportional to 155,460, 214,534.80 and 88,392 is: 121,980.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,460 : 214,534.80 = 88,392 : x
  2. Step 2: Convert to fraction form
    155,460/214,534.80 = 88,392/x
  3. Step 3: Cross multiply
    155,460x = 214,534.80 × 88,392
  4. Step 4: Simplify right side
    155,460x = 18,963,160,041.60
  5. Step 5: Solve for x
    x = 18,963,160,041.60/155,460
  6. Step 6: Final answer
    x = 121,980.96

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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.