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Finding the Fourth Proportional to 191,712.70, 287,569.05 and 98,400.70

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Solution

The fourth proportional to 191,712.70, 287,569.05 and 98,400.70 is: 147,601.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,712.70 : 287,569.05 = 98,400.70 : x
  2. Step 2: Convert to fraction form
    191,712.70/287,569.05 = 98,400.70/x
  3. Step 3: Cross multiply
    191,712.70x = 287,569.05 × 98,400.70
  4. Step 4: Simplify right side
    191,712.70x = 28,296,995,818.34
  5. Step 5: Solve for x
    x = 28,296,995,818.34/191,712.70
  6. Step 6: Final answer
    x = 147,601.05

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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.