Home / 77,309.32-105,887.48-72,770.08

Finding the Fourth Proportional to 77,309.32, 105,887.48 and 72,770.08

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Solution

The fourth proportional to 77,309.32, 105,887.48 and 72,770.08 is: 99,670.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,309.32 : 105,887.48 = 72,770.08 : x
  2. Step 2: Convert to fraction form
    77,309.32/105,887.48 = 72,770.08/x
  3. Step 3: Cross multiply
    77,309.32x = 105,887.48 × 72,770.08
  4. Step 4: Simplify right side
    77,309.32x = 7,705,440,390.60
  5. Step 5: Solve for x
    x = 7,705,440,390.60/77,309.32
  6. Step 6: Final answer
    x = 99,670.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.