Home / 78,421.35-108,221.93-42,611.36

Finding the Fourth Proportional to 78,421.35, 108,221.93 and 42,611.36

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Solution

The fourth proportional to 78,421.35, 108,221.93 and 42,611.36 is: 58,803.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,421.35 : 108,221.93 = 42,611.36 : x
  2. Step 2: Convert to fraction form
    78,421.35/108,221.93 = 42,611.36/x
  3. Step 3: Cross multiply
    78,421.35x = 108,221.93 × 42,611.36
  4. Step 4: Simplify right side
    78,421.35x = 4,611,482,864.96
  5. Step 5: Solve for x
    x = 4,611,482,864.96/78,421.35
  6. Step 6: Final answer
    x = 58,803.92

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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.