Home / 78,491.36-108,316.85-42,681.06

Finding the Fourth Proportional to 78,491.36, 108,316.85 and 42,681.06

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Solution

The fourth proportional to 78,491.36, 108,316.85 and 42,681.06 is: 58,899.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491.36 : 108,316.85 = 42,681.06 : x
  2. Step 2: Convert to fraction form
    78,491.36/108,316.85 = 42,681.06/x
  3. Step 3: Cross multiply
    78,491.36x = 108,316.85 × 42,681.06
  4. Step 4: Simplify right side
    78,491.36x = 4,623,077,760.46
  5. Step 5: Solve for x
    x = 4,623,077,760.46/78,491.36
  6. Step 6: Final answer
    x = 58,899.19

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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.