Home / 98,578.74-136,038.50-56,137.28

Finding the Fourth Proportional to 98,578.74, 136,038.50 and 56,137.28

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Solution

The fourth proportional to 98,578.74, 136,038.50 and 56,137.28 is: 77,469.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,578.74 : 136,038.50 = 56,137.28 : x
  2. Step 2: Convert to fraction form
    98,578.74/136,038.50 = 56,137.28/x
  3. Step 3: Cross multiply
    98,578.74x = 136,038.50 × 56,137.28
  4. Step 4: Simplify right side
    98,578.74x = 7,636,831,365.28
  5. Step 5: Solve for x
    x = 7,636,831,365.28/98,578.74
  6. Step 6: Final answer
    x = 77,469.35

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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.