Home / 128,138.08-192,165.60-42,726.24

Finding the Fourth Proportional to 128,138.08, 192,165.60 and 42,726.24

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Solution

The fourth proportional to 128,138.08, 192,165.60 and 42,726.24 is: 64,075.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,138.08 : 192,165.60 = 42,726.24 : x
  2. Step 2: Convert to fraction form
    128,138.08/192,165.60 = 42,726.24/x
  3. Step 3: Cross multiply
    128,138.08x = 192,165.60 × 42,726.24
  4. Step 4: Simplify right side
    128,138.08x = 8,210,513,545.34
  5. Step 5: Solve for x
    x = 8,210,513,545.34/128,138.08
  6. Step 6: Final answer
    x = 64,075.52

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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.