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Finding the Fourth Proportional to 112,120, 154,726.81 and 61,132.32

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Solution

The fourth proportional to 112,120, 154,726.81 and 61,132.32 is: 84,363.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,120 : 154,726.81 = 61,132.32 : x
  2. Step 2: Convert to fraction form
    112,120/154,726.81 = 61,132.32/x
  3. Step 3: Cross multiply
    112,120x = 154,726.81 × 61,132.32
  4. Step 4: Simplify right side
    112,120x = 9,458,808,861.50
  5. Step 5: Solve for x
    x = 9,458,808,861.50/112,120
  6. Step 6: Final answer
    x = 84,363.26

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1.5x scale

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.