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Finding the Fourth Proportional to 106,930.50, 147,528 and 61,607.28

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Solution

The fourth proportional to 106,930.50, 147,528 and 61,607.28 is: 84,997.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,930.50 : 147,528 = 61,607.28 : x
  2. Step 2: Convert to fraction form
    106,930.50/147,528 = 61,607.28/x
  3. Step 3: Cross multiply
    106,930.50x = 147,528 × 61,607.28
  4. Step 4: Simplify right side
    106,930.50x = 9,088,798,803.84
  5. Step 5: Solve for x
    x = 9,088,798,803.84/106,930.50
  6. Step 6: Final answer
    x = 84,997.25

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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.