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Finding the Fourth Proportional to 281,043, 421,533.45 and 70,681.01

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Solution

The fourth proportional to 281,043, 421,533.45 and 70,681.01 is: 106,013.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,043 : 421,533.45 = 70,681.01 : x
  2. Step 2: Convert to fraction form
    281,043/421,533.45 = 70,681.01/x
  3. Step 3: Cross multiply
    281,043x = 421,533.45 × 70,681.01
  4. Step 4: Simplify right side
    281,043x = 29,794,407,887.12
  5. Step 5: Solve for x
    x = 29,794,407,887.12/281,043
  6. Step 6: Final answer
    x = 106,013.70

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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.