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Finding the Fourth Proportional to 91,841.80, 137,762.70 and 91,258.60

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Solution

The fourth proportional to 91,841.80, 137,762.70 and 91,258.60 is: 136,887.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,841.80 : 137,762.70 = 91,258.60 : x
  2. Step 2: Convert to fraction form
    91,841.80/137,762.70 = 91,258.60/x
  3. Step 3: Cross multiply
    91,841.80x = 137,762.70 × 91,258.60
  4. Step 4: Simplify right side
    91,841.80x = 12,572,031,134.22
  5. Step 5: Solve for x
    x = 12,572,031,134.22/91,841.80
  6. Step 6: Final answer
    x = 136,887.90

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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.