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Finding the Fourth Proportional to 186,897.66, 257,921.46 and 102,012.90

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Solution

The fourth proportional to 186,897.66, 257,921.46 and 102,012.90 is: 140,779.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,897.66 : 257,921.46 = 102,012.90 : x
  2. Step 2: Convert to fraction form
    186,897.66/257,921.46 = 102,012.90/x
  3. Step 3: Cross multiply
    186,897.66x = 257,921.46 × 102,012.90
  4. Step 4: Simplify right side
    186,897.66x = 26,311,316,106.83
  5. Step 5: Solve for x
    x = 26,311,316,106.83/186,897.66
  6. Step 6: Final answer
    x = 140,779.27

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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.