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Finding the Fourth Proportional to 53,315.94, 79,985.20 and 20,036.30

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Solution

The fourth proportional to 53,315.94, 79,985.20 and 20,036.30 is: 30,058.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,315.94 : 79,985.20 = 20,036.30 : x
  2. Step 2: Convert to fraction form
    53,315.94/79,985.20 = 20,036.30/x
  3. Step 3: Cross multiply
    53,315.94x = 79,985.20 × 20,036.30
  4. Step 4: Simplify right side
    53,315.94x = 1,602,607,462.76
  5. Step 5: Solve for x
    x = 1,602,607,462.76/53,315.94
  6. Step 6: Final answer
    x = 30,058.69

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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.