Home / 78,288.18-107,888.54-76,848.68

Finding the Fourth Proportional to 78,288.18, 107,888.54 and 76,848.68

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Solution

The fourth proportional to 78,288.18, 107,888.54 and 76,848.68 is: 105,904.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,288.18 : 107,888.54 = 76,848.68 : x
  2. Step 2: Convert to fraction form
    78,288.18/107,888.54 = 76,848.68/x
  3. Step 3: Cross multiply
    78,288.18x = 107,888.54 × 76,848.68
  4. Step 4: Simplify right side
    78,288.18x = 8,291,090,962.44
  5. Step 5: Solve for x
    x = 8,291,090,962.44/78,288.18
  6. Step 6: Final answer
    x = 105,904.76

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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.