Home / 129,485.16-178,693.02-72,898.56

Finding the Fourth Proportional to 129,485.16, 178,693.02 and 72,898.56

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Solution

The fourth proportional to 129,485.16, 178,693.02 and 72,898.56 is: 100,601.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,485.16 : 178,693.02 = 72,898.56 : x
  2. Step 2: Convert to fraction form
    129,485.16/178,693.02 = 72,898.56/x
  3. Step 3: Cross multiply
    129,485.16x = 178,693.02 × 72,898.56
  4. Step 4: Simplify right side
    129,485.16x = 13,026,463,840.05
  5. Step 5: Solve for x
    x = 13,026,463,840.05/129,485.16
  6. Step 6: Final answer
    x = 100,601.98

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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.