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Finding the Fourth Proportional to 216,577.76, 324,897.12 and 66,830.20

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Solution

The fourth proportional to 216,577.76, 324,897.12 and 66,830.20 is: 100,254.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,577.76 : 324,897.12 = 66,830.20 : x
  2. Step 2: Convert to fraction form
    216,577.76/324,897.12 = 66,830.20/x
  3. Step 3: Cross multiply
    216,577.76x = 324,897.12 × 66,830.20
  4. Step 4: Simplify right side
    216,577.76x = 21,712,939,509.02
  5. Step 5: Solve for x
    x = 21,712,939,509.02/216,577.76
  6. Step 6: Final answer
    x = 100,254.71

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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.