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Finding the Fourth Proportional to 102,390.16, 153,479.89 and 39,195.40

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Solution

The fourth proportional to 102,390.16, 153,479.89 and 39,195.40 is: 58,752.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,390.16 : 153,479.89 = 39,195.40 : x
  2. Step 2: Convert to fraction form
    102,390.16/153,479.89 = 39,195.40/x
  3. Step 3: Cross multiply
    102,390.16x = 153,479.89 × 39,195.40
  4. Step 4: Simplify right side
    102,390.16x = 6,015,705,680.51
  5. Step 5: Solve for x
    x = 6,015,705,680.51/102,390.16
  6. Step 6: Final answer
    x = 58,752.77

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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.