Home / 105,005.40-157,508.10-78,761.40

Finding the Fourth Proportional to 105,005.40, 157,508.10 and 78,761.40

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Solution

The fourth proportional to 105,005.40, 157,508.10 and 78,761.40 is: 118,142.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,005.40 : 157,508.10 = 78,761.40 : x
  2. Step 2: Convert to fraction form
    105,005.40/157,508.10 = 78,761.40/x
  3. Step 3: Cross multiply
    105,005.40x = 157,508.10 × 78,761.40
  4. Step 4: Simplify right side
    105,005.40x = 12,405,558,467.34
  5. Step 5: Solve for x
    x = 12,405,558,467.34/105,005.40
  6. Step 6: Final answer
    x = 118,142.10

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1.5x scale

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.