Home / 145,111.95-200,243.49-81,437.45

Finding the Fourth Proportional to 145,111.95, 200,243.49 and 81,437.45

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Solution

The fourth proportional to 145,111.95, 200,243.49 and 81,437.45 is: 112,377.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,111.95 : 200,243.49 = 81,437.45 : x
  2. Step 2: Convert to fraction form
    145,111.95/200,243.49 = 81,437.45/x
  3. Step 3: Cross multiply
    145,111.95x = 200,243.49 × 81,437.45
  4. Step 4: Simplify right side
    145,111.95x = 16,307,318,203.48
  5. Step 5: Solve for x
    x = 16,307,318,203.48/145,111.95
  6. Step 6: Final answer
    x = 112,377.50

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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.