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Finding the Fourth Proportional to 78,706.56, 108,590.40 and 46,865.28

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Solution

The fourth proportional to 78,706.56, 108,590.40 and 46,865.28 is: 64,659.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,706.56 : 108,590.40 = 46,865.28 : x
  2. Step 2: Convert to fraction form
    78,706.56/108,590.40 = 46,865.28/x
  3. Step 3: Cross multiply
    78,706.56x = 108,590.40 × 46,865.28
  4. Step 4: Simplify right side
    78,706.56x = 5,089,119,501.31
  5. Step 5: Solve for x
    x = 5,089,119,501.31/78,706.56
  6. Step 6: Final answer
    x = 64,659.41

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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.