Home / 78,030.36-107,652.74-51,187.76

Finding the Fourth Proportional to 78,030.36, 107,652.74 and 51,187.76

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Solution

The fourth proportional to 78,030.36, 107,652.74 and 51,187.76 is: 70,619.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,030.36 : 107,652.74 = 51,187.76 : x
  2. Step 2: Convert to fraction form
    78,030.36/107,652.74 = 51,187.76/x
  3. Step 3: Cross multiply
    78,030.36x = 107,652.74 × 51,187.76
  4. Step 4: Simplify right side
    78,030.36x = 5,510,502,618.46
  5. Step 5: Solve for x
    x = 5,510,502,618.46/78,030.36
  6. Step 6: Final answer
    x = 70,619.98

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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.