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Finding the Fourth Proportional to 108,698.58, 149,935.02 and 78,528.24

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Solution

The fourth proportional to 108,698.58, 149,935.02 and 78,528.24 is: 108,319.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,698.58 : 149,935.02 = 78,528.24 : x
  2. Step 2: Convert to fraction form
    108,698.58/149,935.02 = 78,528.24/x
  3. Step 3: Cross multiply
    108,698.58x = 149,935.02 × 78,528.24
  4. Step 4: Simplify right side
    108,698.58x = 11,774,133,234.96
  5. Step 5: Solve for x
    x = 11,774,133,234.96/108,698.58
  6. Step 6: Final answer
    x = 108,319.11

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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.