Home / 65,613.48-90,513.36-42,990.36

Finding the Fourth Proportional to 65,613.48, 90,513.36 and 42,990.36

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Solution

The fourth proportional to 65,613.48, 90,513.36 and 42,990.36 is: 59,304.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,613.48 : 90,513.36 = 42,990.36 : x
  2. Step 2: Convert to fraction form
    65,613.48/90,513.36 = 42,990.36/x
  3. Step 3: Cross multiply
    65,613.48x = 90,513.36 × 42,990.36
  4. Step 4: Simplify right side
    65,613.48x = 3,891,201,931.21
  5. Step 5: Solve for x
    x = 3,891,201,931.21/65,613.48
  6. Step 6: Final answer
    x = 59,304.92

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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.