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Finding the Fourth Proportional to 99,111.80, 148,235.70 and 88,657.40

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Solution

The fourth proportional to 99,111.80, 148,235.70 and 88,657.40 is: 132,599.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,111.80 : 148,235.70 = 88,657.40 : x
  2. Step 2: Convert to fraction form
    99,111.80/148,235.70 = 88,657.40/x
  3. Step 3: Cross multiply
    99,111.80x = 148,235.70 × 88,657.40
  4. Step 4: Simplify right side
    99,111.80x = 13,142,191,749.18
  5. Step 5: Solve for x
    x = 13,142,191,749.18/99,111.80
  6. Step 6: Final answer
    x = 132,599.67

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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.