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Finding the Fourth Proportional to 191,307.61, 286,698.93 and 121,061.17

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Solution

The fourth proportional to 191,307.61, 286,698.93 and 121,061.17 is: 181,425.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,307.61 : 286,698.93 = 121,061.17 : x
  2. Step 2: Convert to fraction form
    191,307.61/286,698.93 = 121,061.17/x
  3. Step 3: Cross multiply
    191,307.61x = 286,698.93 × 121,061.17
  4. Step 4: Simplify right side
    191,307.61x = 34,708,107,903.55
  5. Step 5: Solve for x
    x = 34,708,107,903.55/191,307.61
  6. Step 6: Final answer
    x = 181,425.65

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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.