Home / 128,220.38-176,938.94-74,501.18

Finding the Fourth Proportional to 128,220.38, 176,938.94 and 74,501.18

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Solution

The fourth proportional to 128,220.38, 176,938.94 and 74,501.18 is: 102,808.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,220.38 : 176,938.94 = 74,501.18 : x
  2. Step 2: Convert to fraction form
    128,220.38/176,938.94 = 74,501.18/x
  3. Step 3: Cross multiply
    128,220.38x = 176,938.94 × 74,501.18
  4. Step 4: Simplify right side
    128,220.38x = 13,182,159,817.95
  5. Step 5: Solve for x
    x = 13,182,159,817.95/128,220.38
  6. Step 6: Final answer
    x = 102,808.62

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1.5x scale

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.