Home / 145,539.89-200,828.79-81,876.32

Finding the Fourth Proportional to 145,539.89, 200,828.79 and 81,876.32

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Solution

The fourth proportional to 145,539.89, 200,828.79 and 81,876.32 is: 112,980.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,539.89 : 200,828.79 = 81,876.32 : x
  2. Step 2: Convert to fraction form
    145,539.89/200,828.79 = 81,876.32/x
  3. Step 3: Cross multiply
    145,539.89x = 200,828.79 × 81,876.32
  4. Step 4: Simplify right side
    145,539.89x = 16,443,121,271.11
  5. Step 5: Solve for x
    x = 16,443,121,271.11/145,539.89
  6. Step 6: Final answer
    x = 112,980.17

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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.