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Finding the Fourth Proportional to 77,978.03, 116,885.64 and 56,579.05

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Solution

The fourth proportional to 77,978.03, 116,885.64 and 56,579.05 is: 84,809.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,978.03 : 116,885.64 = 56,579.05 : x
  2. Step 2: Convert to fraction form
    77,978.03/116,885.64 = 56,579.05/x
  3. Step 3: Cross multiply
    77,978.03x = 116,885.64 × 56,579.05
  4. Step 4: Simplify right side
    77,978.03x = 6,613,277,602.52
  5. Step 5: Solve for x
    x = 6,613,277,602.52/77,978.03
  6. Step 6: Final answer
    x = 84,809.50

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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.