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Finding the Fourth Proportional to 191,145.75, 286,753.23 and 78,763.47

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Solution

The fourth proportional to 191,145.75, 286,753.23 and 78,763.47 is: 118,159.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,145.75 : 286,753.23 = 78,763.47 : x
  2. Step 2: Convert to fraction form
    191,145.75/286,753.23 = 78,763.47/x
  3. Step 3: Cross multiply
    191,145.75x = 286,753.23 × 78,763.47
  4. Step 4: Simplify right side
    191,145.75x = 22,585,679,428.51
  5. Step 5: Solve for x
    x = 22,585,679,428.51/191,145.75
  6. Step 6: Final answer
    x = 118,159.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.