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Finding the Fourth Proportional to 90,001.60, 134,894.40 and 61,921.60

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Solution

The fourth proportional to 90,001.60, 134,894.40 and 61,921.60 is: 92,808.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,001.60 : 134,894.40 = 61,921.60 : x
  2. Step 2: Convert to fraction form
    90,001.60/134,894.40 = 61,921.60/x
  3. Step 3: Cross multiply
    90,001.60x = 134,894.40 × 61,921.60
  4. Step 4: Simplify right side
    90,001.60x = 8,352,877,079.04
  5. Step 5: Solve for x
    x = 8,352,877,079.04/90,001.60
  6. Step 6: Final answer
    x = 92,808.10

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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.