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Finding the Fourth Proportional to 74,746.40, 112,120.00 and 19,342.40

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Solution

The fourth proportional to 74,746.40, 112,120.00 and 19,342.40 is: 29,013.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,746.40 : 112,120.00 = 19,342.40 : x
  2. Step 2: Convert to fraction form
    74,746.40/112,120.00 = 19,342.40/x
  3. Step 3: Cross multiply
    74,746.40x = 112,120.00 × 19,342.40
  4. Step 4: Simplify right side
    74,746.40x = 2,168,669,279.04
  5. Step 5: Solve for x
    x = 2,168,669,279.04/74,746.40
  6. Step 6: Final answer
    x = 29,013.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.