Home / 78,302,430.80-117,453,646.20-20,803,576.40

Finding the Fourth Proportional to 78,302,430.80, 117,453,646.20 and 20,803,576.40

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Solution

The fourth proportional to 78,302,430.80, 117,453,646.20 and 20,803,576.40 is: 31,205,364.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,302,430.80 : 117,453,646.20 = 20,803,576.40 : x
  2. Step 2: Convert to fraction form
    78,302,430.80/117,453,646.20 = 20,803,576.40/x
  3. Step 3: Cross multiply
    78,302,430.80x = 117,453,646.20 × 20,803,576.40
  4. Step 4: Simplify right side
    78,302,430.80x = 2,443,455,902,180,269.50
  5. Step 5: Solve for x
    x = 2,443,455,902,180,269.50/78,302,430.80
  6. Step 6: Final answer
    x = 31,205,364.60

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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.