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Finding the Fourth Proportional to 101,802.70, 140,482.98 and 56,480.20

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Solution

The fourth proportional to 101,802.70, 140,482.98 and 56,480.20 is: 77,940.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,802.70 : 140,482.98 = 56,480.20 : x
  2. Step 2: Convert to fraction form
    101,802.70/140,482.98 = 56,480.20/x
  3. Step 3: Cross multiply
    101,802.70x = 140,482.98 × 56,480.20
  4. Step 4: Simplify right side
    101,802.70x = 7,934,506,104.58
  5. Step 5: Solve for x
    x = 7,934,506,104.58/101,802.70
  6. Step 6: Final answer
    x = 77,940.04

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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.