Home / 142,595.28-196,779.10-78,931.72

Finding the Fourth Proportional to 142,595.28, 196,779.10 and 78,931.72

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Solution

The fourth proportional to 142,595.28, 196,779.10 and 78,931.72 is: 108,924.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,595.28 : 196,779.10 = 78,931.72 : x
  2. Step 2: Convert to fraction form
    142,595.28/196,779.10 = 78,931.72/x
  3. Step 3: Cross multiply
    142,595.28x = 196,779.10 × 78,931.72
  4. Step 4: Simplify right side
    142,595.28x = 15,532,112,823.05
  5. Step 5: Solve for x
    x = 15,532,112,823.05/142,595.28
  6. Step 6: Final answer
    x = 108,924.45

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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.