Home / 78,541.13-108,386.15-42,731.03

Finding the Fourth Proportional to 78,541.13, 108,386.15 and 42,731.03

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Solution

The fourth proportional to 78,541.13, 108,386.15 and 42,731.03 is: 58,968.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,541.13 : 108,386.15 = 42,731.03 : x
  2. Step 2: Convert to fraction form
    78,541.13/108,386.15 = 42,731.03/x
  3. Step 3: Cross multiply
    78,541.13x = 108,386.15 × 42,731.03
  4. Step 4: Simplify right side
    78,541.13x = 4,631,451,071.65
  5. Step 5: Solve for x
    x = 4,631,451,071.65/78,541.13
  6. Step 6: Final answer
    x = 58,968.48

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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.