Home / 78,569.89-108,424.36-42,759.13

Finding the Fourth Proportional to 78,569.89, 108,424.36 and 42,759.13

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Solution

The fourth proportional to 78,569.89, 108,424.36 and 42,759.13 is: 59,006.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,569.89 : 108,424.36 = 42,759.13 : x
  2. Step 2: Convert to fraction form
    78,569.89/108,424.36 = 42,759.13/x
  3. Step 3: Cross multiply
    78,569.89x = 108,424.36 × 42,759.13
  4. Step 4: Simplify right side
    78,569.89x = 4,636,130,548.49
  5. Step 5: Solve for x
    x = 4,636,130,548.49/78,569.89
  6. Step 6: Final answer
    x = 59,006.46

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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.