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Finding the Fourth Proportional to 159,368.10, 219,920.04 and 87,746.28

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Solution

The fourth proportional to 159,368.10, 219,920.04 and 87,746.28 is: 121,085.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,368.10 : 219,920.04 = 87,746.28 : x
  2. Step 2: Convert to fraction form
    159,368.10/219,920.04 = 87,746.28/x
  3. Step 3: Cross multiply
    159,368.10x = 219,920.04 × 87,746.28
  4. Step 4: Simplify right side
    159,368.10x = 19,297,165,407.45
  5. Step 5: Solve for x
    x = 19,297,165,407.45/159,368.10
  6. Step 6: Final answer
    x = 121,085.50

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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.