Home / 145,233.18-200,421-81,570.96

Finding the Fourth Proportional to 145,233.18, 200,421 and 81,570.96

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Solution

The fourth proportional to 145,233.18, 200,421 and 81,570.96 is: 112,567.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,233.18 : 200,421 = 81,570.96 : x
  2. Step 2: Convert to fraction form
    145,233.18/200,421 = 81,570.96/x
  3. Step 3: Cross multiply
    145,233.18x = 200,421 × 81,570.96
  4. Step 4: Simplify right side
    145,233.18x = 16,348,533,374.16
  5. Step 5: Solve for x
    x = 16,348,533,374.16/145,233.18
  6. Step 6: Final answer
    x = 112,567.48

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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.