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Finding the Fourth Proportional to 287,565.70, 431,348.55 and 130,101.70

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Solution

The fourth proportional to 287,565.70, 431,348.55 and 130,101.70 is: 195,152.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,565.70 : 431,348.55 = 130,101.70 : x
  2. Step 2: Convert to fraction form
    287,565.70/431,348.55 = 130,101.70/x
  3. Step 3: Cross multiply
    287,565.70x = 431,348.55 × 130,101.70
  4. Step 4: Simplify right side
    287,565.70x = 56,119,179,647.54
  5. Step 5: Solve for x
    x = 56,119,179,647.54/287,565.70
  6. Step 6: Final answer
    x = 195,152.55

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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.