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Finding the Fourth Proportional to 166,428, 249,642 and 55,620

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Solution

The fourth proportional to 166,428, 249,642 and 55,620 is: 83,430

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,428 : 249,642 = 55,620 : x
  2. Step 2: Convert to fraction form
    166,428/249,642 = 55,620/x
  3. Step 3: Cross multiply
    166,428x = 249,642 × 55,620
  4. Step 4: Simplify right side
    166,428x = 13,885,088,040
  5. Step 5: Solve for x
    x = 13,885,088,040/166,428
  6. Step 6: Final answer
    x = 83,430

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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.