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Finding the Fourth Proportional to 99,654.58, 149,312.74 and 60,128.67

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Solution

The fourth proportional to 99,654.58, 149,312.74 and 60,128.67 is: 90,090.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,654.58 : 149,312.74 = 60,128.67 : x
  2. Step 2: Convert to fraction form
    99,654.58/149,312.74 = 60,128.67/x
  3. Step 3: Cross multiply
    99,654.58x = 149,312.74 × 60,128.67
  4. Step 4: Simplify right side
    99,654.58x = 8,977,976,470.26
  5. Step 5: Solve for x
    x = 8,977,976,470.26/99,654.58
  6. Step 6: Final answer
    x = 90,090.96

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1.5x scale

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.