Home / 77,316.32-105,897.07-72,777.08

Finding the Fourth Proportional to 77,316.32, 105,897.07 and 72,777.08

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Solution

The fourth proportional to 77,316.32, 105,897.07 and 72,777.08 is: 99,679.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,316.32 : 105,897.07 = 72,777.08 : x
  2. Step 2: Convert to fraction form
    77,316.32/105,897.07 = 72,777.08/x
  3. Step 3: Cross multiply
    77,316.32x = 105,897.07 × 72,777.08
  4. Step 4: Simplify right side
    77,316.32x = 7,706,879,535.16
  5. Step 5: Solve for x
    x = 7,706,879,535.16/77,316.32
  6. Step 6: Final answer
    x = 99,679.85

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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.