Home / 103,856.79-143,341.02-99,123.75

Finding the Fourth Proportional to 103,856.79, 143,341.02 and 99,123.75

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Solution

The fourth proportional to 103,856.79, 143,341.02 and 99,123.75 is: 136,808.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,856.79 : 143,341.02 = 99,123.75 : x
  2. Step 2: Convert to fraction form
    103,856.79/143,341.02 = 99,123.75/x
  3. Step 3: Cross multiply
    103,856.79x = 143,341.02 × 99,123.75
  4. Step 4: Simplify right side
    103,856.79x = 14,208,499,431.23
  5. Step 5: Solve for x
    x = 14,208,499,431.23/103,856.79
  6. Step 6: Final answer
    x = 136,808.57

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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.