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Finding the Fourth Proportional to 65,347.03, 90,165.13 and 42,719.32

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Solution

The fourth proportional to 65,347.03, 90,165.13 and 42,719.32 is: 58,943.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,347.03 : 90,165.13 = 42,719.32 : x
  2. Step 2: Convert to fraction form
    65,347.03/90,165.13 = 42,719.32/x
  3. Step 3: Cross multiply
    65,347.03x = 90,165.13 × 42,719.32
  4. Step 4: Simplify right side
    65,347.03x = 3,851,793,041.31
  5. Step 5: Solve for x
    x = 3,851,793,041.31/65,347.03
  6. Step 6: Final answer
    x = 58,943.66

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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.