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Finding the Fourth Proportional to 78,661.50, 108,477.43 and 52,878.39

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Solution

The fourth proportional to 78,661.50, 108,477.43 and 52,878.39 is: 72,921.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,661.50 : 108,477.43 = 52,878.39 : x
  2. Step 2: Convert to fraction form
    78,661.50/108,477.43 = 52,878.39/x
  3. Step 3: Cross multiply
    78,661.50x = 108,477.43 × 52,878.39
  4. Step 4: Simplify right side
    78,661.50x = 5,736,111,849.74
  5. Step 5: Solve for x
    x = 5,736,111,849.74/78,661.50
  6. Step 6: Final answer
    x = 72,921.47

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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.