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Finding the Fourth Proportional to 99,009.80, 136,601.16 and 63,211.40

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Solution

The fourth proportional to 99,009.80, 136,601.16 and 63,211.40 is: 87,211.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,009.80 : 136,601.16 = 63,211.40 : x
  2. Step 2: Convert to fraction form
    99,009.80/136,601.16 = 63,211.40/x
  3. Step 3: Cross multiply
    99,009.80x = 136,601.16 × 63,211.40
  4. Step 4: Simplify right side
    99,009.80x = 8,634,750,565.22
  5. Step 5: Solve for x
    x = 8,634,750,565.22/99,009.80
  6. Step 6: Final answer
    x = 87,211.07

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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.