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Finding the Fourth Proportional to 97,877.80, 146,816.70 and 90,879.40

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Solution

The fourth proportional to 97,877.80, 146,816.70 and 90,879.40 is: 136,319.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,877.80 : 146,816.70 = 90,879.40 : x
  2. Step 2: Convert to fraction form
    97,877.80/146,816.70 = 90,879.40/x
  3. Step 3: Cross multiply
    97,877.80x = 146,816.70 × 90,879.40
  4. Step 4: Simplify right side
    97,877.80x = 13,342,613,605.98
  5. Step 5: Solve for x
    x = 13,342,613,605.98/97,877.80
  6. Step 6: Final answer
    x = 136,319.10

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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.