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Finding the Fourth Proportional to 85,334.60, 128,001.90 and 54,307.40

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Solution

The fourth proportional to 85,334.60, 128,001.90 and 54,307.40 is: 81,461.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,334.60 : 128,001.90 = 54,307.40 : x
  2. Step 2: Convert to fraction form
    85,334.60/128,001.90 = 54,307.40/x
  3. Step 3: Cross multiply
    85,334.60x = 128,001.90 × 54,307.40
  4. Step 4: Simplify right side
    85,334.60x = 6,951,450,384.06
  5. Step 5: Solve for x
    x = 6,951,450,384.06/85,334.60
  6. Step 6: Final answer
    x = 81,461.10

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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.