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Finding the Fourth Proportional to 128,594.69, 177,460.47 and 72,006.06

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Solution

The fourth proportional to 128,594.69, 177,460.47 and 72,006.06 is: 99,368.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,594.69 : 177,460.47 = 72,006.06 : x
  2. Step 2: Convert to fraction form
    128,594.69/177,460.47 = 72,006.06/x
  3. Step 3: Cross multiply
    128,594.69x = 177,460.47 × 72,006.06
  4. Step 4: Simplify right side
    128,594.69x = 12,778,229,915.93
  5. Step 5: Solve for x
    x = 12,778,229,915.93/128,594.69
  6. Step 6: Final answer
    x = 99,368.26

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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.