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Finding the Fourth Proportional to 78,856.30, 118,284.45 and 56,622.70

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Solution

The fourth proportional to 78,856.30, 118,284.45 and 56,622.70 is: 84,934.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,856.30 : 118,284.45 = 56,622.70 : x
  2. Step 2: Convert to fraction form
    78,856.30/118,284.45 = 56,622.70/x
  3. Step 3: Cross multiply
    78,856.30x = 118,284.45 × 56,622.70
  4. Step 4: Simplify right side
    78,856.30x = 6,697,584,927.02
  5. Step 5: Solve for x
    x = 6,697,584,927.02/78,856.30
  6. Step 6: Final answer
    x = 84,934.05

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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.