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Finding the Fourth Proportional to 158,478.64, 218,698.68 and 85,880.08

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Solution

The fourth proportional to 158,478.64, 218,698.68 and 85,880.08 is: 118,513.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,478.64 : 218,698.68 = 85,880.08 : x
  2. Step 2: Convert to fraction form
    158,478.64/218,698.68 = 85,880.08/x
  3. Step 3: Cross multiply
    158,478.64x = 218,698.68 × 85,880.08
  4. Step 4: Simplify right side
    158,478.64x = 18,781,860,134.29
  5. Step 5: Solve for x
    x = 18,781,860,134.29/158,478.64
  6. Step 6: Final answer
    x = 118,513.51

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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.