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Finding the Fourth Proportional to 76,661.01, 105,779.02 and 70,460.08

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Solution

The fourth proportional to 76,661.01, 105,779.02 and 70,460.08 is: 97,222.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,661.01 : 105,779.02 = 70,460.08 : x
  2. Step 2: Convert to fraction form
    76,661.01/105,779.02 = 70,460.08/x
  3. Step 3: Cross multiply
    76,661.01x = 105,779.02 × 70,460.08
  4. Step 4: Simplify right side
    76,661.01x = 7,453,198,211.52
  5. Step 5: Solve for x
    x = 7,453,198,211.52/76,661.01
  6. Step 6: Final answer
    x = 97,222.80

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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.