Home / 65,280.78-90,080.67-38,421.66

Finding the Fourth Proportional to 65,280.78, 90,080.67 and 38,421.66

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Solution

The fourth proportional to 65,280.78, 90,080.67 and 38,421.66 is: 53,017.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,280.78 : 90,080.67 = 38,421.66 : x
  2. Step 2: Convert to fraction form
    65,280.78/90,080.67 = 38,421.66/x
  3. Step 3: Cross multiply
    65,280.78x = 90,080.67 × 38,421.66
  4. Step 4: Simplify right side
    65,280.78x = 3,461,048,875.31
  5. Step 5: Solve for x
    x = 3,461,048,875.31/65,280.78
  6. Step 6: Final answer
    x = 53,017.88

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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.