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Finding the Fourth Proportional to 257,957.60, 386,936.40 and 70,968.80

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Solution

The fourth proportional to 257,957.60, 386,936.40 and 70,968.80 is: 106,453.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,957.60 : 386,936.40 = 70,968.80 : x
  2. Step 2: Convert to fraction form
    257,957.60/386,936.40 = 70,968.80/x
  3. Step 3: Cross multiply
    257,957.60x = 386,936.40 × 70,968.80
  4. Step 4: Simplify right side
    257,957.60x = 27,460,411,984.32
  5. Step 5: Solve for x
    x = 27,460,411,984.32/257,957.60
  6. Step 6: Final answer
    x = 106,453.20

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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.