Home / 103,411.40-142,721.18-63,116.80

Finding the Fourth Proportional to 103,411.40, 142,721.18 and 63,116.80

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Solution

The fourth proportional to 103,411.40, 142,721.18 and 63,116.80 is: 87,109.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,411.40 : 142,721.18 = 63,116.80 : x
  2. Step 2: Convert to fraction form
    103,411.40/142,721.18 = 63,116.80/x
  3. Step 3: Cross multiply
    103,411.40x = 142,721.18 × 63,116.80
  4. Step 4: Simplify right side
    103,411.40x = 9,008,104,173.82
  5. Step 5: Solve for x
    x = 9,008,104,173.82/103,411.40
  6. Step 6: Final answer
    x = 87,109.39

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1.5x scale

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.