Home / 78,461.10-117,654.57-28,506.36

Finding the Fourth Proportional to 78,461.10, 117,654.57 and 28,506.36

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Solution

The fourth proportional to 78,461.10, 117,654.57 and 28,506.36 is: 42,746.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,461.10 : 117,654.57 = 28,506.36 : x
  2. Step 2: Convert to fraction form
    78,461.10/117,654.57 = 28,506.36/x
  3. Step 3: Cross multiply
    78,461.10x = 117,654.57 × 28,506.36
  4. Step 4: Simplify right side
    78,461.10x = 3,353,903,528.07
  5. Step 5: Solve for x
    x = 3,353,903,528.07/78,461.10
  6. Step 6: Final answer
    x = 42,746.07

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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.