Home / 78,699.21-108,601.75-42,888.45

Finding the Fourth Proportional to 78,699.21, 108,601.75 and 42,888.45

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Solution

The fourth proportional to 78,699.21, 108,601.75 and 42,888.45 is: 59,184.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,699.21 : 108,601.75 = 42,888.45 : x
  2. Step 2: Convert to fraction form
    78,699.21/108,601.75 = 42,888.45/x
  3. Step 3: Cross multiply
    78,699.21x = 108,601.75 × 42,888.45
  4. Step 4: Simplify right side
    78,699.21x = 4,657,760,724.79
  5. Step 5: Solve for x
    x = 4,657,760,724.79/78,699.21
  6. Step 6: Final answer
    x = 59,184.34

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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.