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Finding the Fourth Proportional to 100,888.80, 139,223.77 and 57,875.50

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Solution

The fourth proportional to 100,888.80, 139,223.77 and 57,875.50 is: 79,866.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,888.80 : 139,223.77 = 57,875.50 : x
  2. Step 2: Convert to fraction form
    100,888.80/139,223.77 = 57,875.50/x
  3. Step 3: Cross multiply
    100,888.80x = 139,223.77 × 57,875.50
  4. Step 4: Simplify right side
    100,888.80x = 8,057,645,300.64
  5. Step 5: Solve for x
    x = 8,057,645,300.64/100,888.80
  6. Step 6: Final answer
    x = 79,866.60

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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.