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Finding the Fourth Proportional to 98,955.72, 136,739.64 and 72,051.30

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Solution

The fourth proportional to 98,955.72, 136,739.64 and 72,051.30 is: 99,562.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,955.72 : 136,739.64 = 72,051.30 : x
  2. Step 2: Convert to fraction form
    98,955.72/136,739.64 = 72,051.30/x
  3. Step 3: Cross multiply
    98,955.72x = 136,739.64 × 72,051.30
  4. Step 4: Simplify right side
    98,955.72x = 9,852,268,823.53
  5. Step 5: Solve for x
    x = 9,852,268,823.53/98,955.72
  6. Step 6: Final answer
    x = 99,562.40

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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.