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Finding the Fourth Proportional to 98,918.55, 136,554.90 and 56,468.88

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Solution

The fourth proportional to 98,918.55, 136,554.90 and 56,468.88 is: 77,954.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,918.55 : 136,554.90 = 56,468.88 : x
  2. Step 2: Convert to fraction form
    98,918.55/136,554.90 = 56,468.88/x
  3. Step 3: Cross multiply
    98,918.55x = 136,554.90 × 56,468.88
  4. Step 4: Simplify right side
    98,918.55x = 7,711,102,261.51
  5. Step 5: Solve for x
    x = 7,711,102,261.51/98,918.55
  6. Step 6: Final answer
    x = 77,954.06

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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.