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Finding the Fourth Proportional to 191,201.70, 286,802.55 and 121,160.10

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Solution

The fourth proportional to 191,201.70, 286,802.55 and 121,160.10 is: 181,740.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,201.70 : 286,802.55 = 121,160.10 : x
  2. Step 2: Convert to fraction form
    191,201.70/286,802.55 = 121,160.10/x
  3. Step 3: Cross multiply
    191,201.70x = 286,802.55 × 121,160.10
  4. Step 4: Simplify right side
    191,201.70x = 34,749,025,638.26
  5. Step 5: Solve for x
    x = 34,749,025,638.26/191,201.70
  6. Step 6: Final answer
    x = 181,740.15

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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.