Home / 109,678.35-151,359.23-61,938.88

Finding the Fourth Proportional to 109,678.35, 151,359.23 and 61,938.88

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Solution

The fourth proportional to 109,678.35, 151,359.23 and 61,938.88 is: 85,477.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,678.35 : 151,359.23 = 61,938.88 : x
  2. Step 2: Convert to fraction form
    109,678.35/151,359.23 = 61,938.88/x
  3. Step 3: Cross multiply
    109,678.35x = 151,359.23 × 61,938.88
  4. Step 4: Simplify right side
    109,678.35x = 9,375,020,960.31
  5. Step 5: Solve for x
    x = 9,375,020,960.31/109,678.35
  6. Step 6: Final answer
    x = 85,477.40

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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.