Home / 87,088.40-130,690.78-31,684.40

Finding the Fourth Proportional to 87,088.40, 130,690.78 and 31,684.40

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Solution

The fourth proportional to 87,088.40, 130,690.78 and 31,684.40 is: 47,547.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,088.40 : 130,690.78 = 31,684.40 : x
  2. Step 2: Convert to fraction form
    87,088.40/130,690.78 = 31,684.40/x
  3. Step 3: Cross multiply
    87,088.40x = 130,690.78 × 31,684.40
  4. Step 4: Simplify right side
    87,088.40x = 4,140,858,949.83
  5. Step 5: Solve for x
    x = 4,140,858,949.83/87,088.40
  6. Step 6: Final answer
    x = 47,547.77

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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.