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Finding the Fourth Proportional to 91,990.70, 126,957.68 and 51,158.89

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Solution

The fourth proportional to 91,990.70, 126,957.68 and 51,158.89 is: 70,605.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,990.70 : 126,957.68 = 51,158.89 : x
  2. Step 2: Convert to fraction form
    91,990.70/126,957.68 = 51,158.89/x
  3. Step 3: Cross multiply
    91,990.70x = 126,957.68 × 51,158.89
  4. Step 4: Simplify right side
    91,990.70x = 6,495,014,080.52
  5. Step 5: Solve for x
    x = 6,495,014,080.52/91,990.70
  6. Step 6: Final answer
    x = 70,605.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.