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Finding the Fourth Proportional to 115,528.64, 173,280.99 and 78,327.68

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Solution

The fourth proportional to 115,528.64, 173,280.99 and 78,327.68 is: 117,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,528.64 : 173,280.99 = 78,327.68 : x
  2. Step 2: Convert to fraction form
    115,528.64/173,280.99 = 78,327.68/x
  3. Step 3: Cross multiply
    115,528.64x = 173,280.99 × 78,327.68
  4. Step 4: Simplify right side
    115,528.64x = 13,572,697,934.80
  5. Step 5: Solve for x
    x = 13,572,697,934.80/115,528.64
  6. Step 6: Final answer
    x = 117,483.40

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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.