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Finding the Fourth Proportional to 230,045.55, 317,456.67 and 128,071.02

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Solution

The fourth proportional to 230,045.55, 317,456.67 and 128,071.02 is: 176,734.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,045.55 : 317,456.67 = 128,071.02 : x
  2. Step 2: Convert to fraction form
    230,045.55/317,456.67 = 128,071.02/x
  3. Step 3: Cross multiply
    230,045.55x = 317,456.67 × 128,071.02
  4. Step 4: Simplify right side
    230,045.55x = 40,656,999,532.70
  5. Step 5: Solve for x
    x = 40,656,999,532.70/230,045.55
  6. Step 6: Final answer
    x = 176,734.56

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1.5x scale

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.