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Finding the Fourth Proportional to 111,657.60, 154,085.76 and 61,355.52

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Solution

The fourth proportional to 111,657.60, 154,085.76 and 61,355.52 is: 84,669.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,657.60 : 154,085.76 = 61,355.52 : x
  2. Step 2: Convert to fraction form
    111,657.60/154,085.76 = 61,355.52/x
  3. Step 3: Cross multiply
    111,657.60x = 154,085.76 × 61,355.52
  4. Step 4: Simplify right side
    111,657.60x = 9,454,011,929.40
  5. Step 5: Solve for x
    x = 9,454,011,929.40/111,657.60
  6. Step 6: Final answer
    x = 84,669.67

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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.