Home / 72,420.08-99,939.48-42,223.28

Finding the Fourth Proportional to 72,420.08, 99,939.48 and 42,223.28

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Solution

The fourth proportional to 72,420.08, 99,939.48 and 42,223.28 is: 58,267.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,420.08 : 99,939.48 = 42,223.28 : x
  2. Step 2: Convert to fraction form
    72,420.08/99,939.48 = 42,223.28/x
  3. Step 3: Cross multiply
    72,420.08x = 99,939.48 × 42,223.28
  4. Step 4: Simplify right side
    72,420.08x = 4,219,772,647.09
  5. Step 5: Solve for x
    x = 4,219,772,647.09/72,420.08
  6. Step 6: Final answer
    x = 58,267.99

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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.