Home / 210,220.15-315,142.68-77,069.32

Finding the Fourth Proportional to 210,220.15, 315,142.68 and 77,069.32

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Solution

The fourth proportional to 210,220.15, 315,142.68 and 77,069.32 is: 115,535.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,220.15 : 315,142.68 = 77,069.32 : x
  2. Step 2: Convert to fraction form
    210,220.15/315,142.68 = 77,069.32/x
  3. Step 3: Cross multiply
    210,220.15x = 315,142.68 × 77,069.32
  4. Step 4: Simplify right side
    210,220.15x = 24,287,830,474.86
  5. Step 5: Solve for x
    x = 24,287,830,474.86/210,220.15
  6. Step 6: Final answer
    x = 115,535.22

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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.