Home / 139,779.48-208,496.13-128,316.36

Finding the Fourth Proportional to 139,779.48, 208,496.13 and 128,316.36

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Solution

The fourth proportional to 139,779.48, 208,496.13 and 128,316.36 is: 191,397.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,779.48 : 208,496.13 = 128,316.36 : x
  2. Step 2: Convert to fraction form
    139,779.48/208,496.13 = 128,316.36/x
  3. Step 3: Cross multiply
    139,779.48x = 208,496.13 × 128,316.36
  4. Step 4: Simplify right side
    139,779.48x = 26,753,464,475.69
  5. Step 5: Solve for x
    x = 26,753,464,475.69/139,779.48
  6. Step 6: Final answer
    x = 191,397.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.