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Finding the Fourth Proportional to 157,028, 216,700.80 and 89,960

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Solution

The fourth proportional to 157,028, 216,700.80 and 89,960 is: 124,146.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,028 : 216,700.80 = 89,960 : x
  2. Step 2: Convert to fraction form
    157,028/216,700.80 = 89,960/x
  3. Step 3: Cross multiply
    157,028x = 216,700.80 × 89,960
  4. Step 4: Simplify right side
    157,028x = 19,494,403,968
  5. Step 5: Solve for x
    x = 19,494,403,968/157,028
  6. Step 6: Final answer
    x = 124,146.04

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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.