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Finding the Fourth Proportional to 191,111.40, 286,580.70 and 85,876.20

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Solution

The fourth proportional to 191,111.40, 286,580.70 and 85,876.20 is: 128,775.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,111.40 : 286,580.70 = 85,876.20 : x
  2. Step 2: Convert to fraction form
    191,111.40/286,580.70 = 85,876.20/x
  3. Step 3: Cross multiply
    191,111.40x = 286,580.70 × 85,876.20
  4. Step 4: Simplify right side
    191,111.40x = 24,610,461,509.34
  5. Step 5: Solve for x
    x = 24,610,461,509.34/191,111.40
  6. Step 6: Final answer
    x = 128,775.48

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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.