Home / 78,282,409.56-117,414,490.50-20,779,148.76

Finding the Fourth Proportional to 78,282,409.56, 117,414,490.50 and 20,779,148.76

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Solution

The fourth proportional to 78,282,409.56, 117,414,490.50 and 20,779,148.76 is: 31,166,301.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,282,409.56 : 117,414,490.50 = 20,779,148.76 : x
  2. Step 2: Convert to fraction form
    78,282,409.56/117,414,490.50 = 20,779,148.76/x
  3. Step 3: Cross multiply
    78,282,409.56x = 117,414,490.50 × 20,779,148.76
  4. Step 4: Simplify right side
    78,282,409.56x = 2,439,773,164,679,107
  5. Step 5: Solve for x
    x = 2,439,773,164,679,107/78,282,409.56
  6. Step 6: Final answer
    x = 31,166,301.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.