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Finding the Fourth Proportional to 84,885.60, 127,235.40 and 42,698.40

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Solution

The fourth proportional to 84,885.60, 127,235.40 and 42,698.40 is: 64,000.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,885.60 : 127,235.40 = 42,698.40 : x
  2. Step 2: Convert to fraction form
    84,885.60/127,235.40 = 42,698.40/x
  3. Step 3: Cross multiply
    84,885.60x = 127,235.40 × 42,698.40
  4. Step 4: Simplify right side
    84,885.60x = 5,432,748,003.36
  5. Step 5: Solve for x
    x = 5,432,748,003.36/84,885.60
  6. Step 6: Final answer
    x = 64,000.82

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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.