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Finding the Fourth Proportional to 65,607.04, 90,507 and 38,731.24

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Solution

The fourth proportional to 65,607.04, 90,507 and 38,731.24 is: 53,430.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,607.04 : 90,507 = 38,731.24 : x
  2. Step 2: Convert to fraction form
    65,607.04/90,507 = 38,731.24/x
  3. Step 3: Cross multiply
    65,607.04x = 90,507 × 38,731.24
  4. Step 4: Simplify right side
    65,607.04x = 3,505,448,338.68
  5. Step 5: Solve for x
    x = 3,505,448,338.68/65,607.04
  6. Step 6: Final answer
    x = 53,430.98

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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.