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Finding the Fourth Proportional to 88,155, 121,705.82 and 53,712.74

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Solution

The fourth proportional to 88,155, 121,705.82 and 53,712.74 is: 74,155.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,155 : 121,705.82 = 53,712.74 : x
  2. Step 2: Convert to fraction form
    88,155/121,705.82 = 53,712.74/x
  3. Step 3: Cross multiply
    88,155x = 121,705.82 × 53,712.74
  4. Step 4: Simplify right side
    88,155x = 6,537,152,189.05
  5. Step 5: Solve for x
    x = 6,537,152,189.05/88,155
  6. Step 6: Final answer
    x = 74,155.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.