Home / 142,838.10-197,050.32-100,421.64

Finding the Fourth Proportional to 142,838.10, 197,050.32 and 100,421.64

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Solution

The fourth proportional to 142,838.10, 197,050.32 and 100,421.64 is: 138,535.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,838.10 : 197,050.32 = 100,421.64 : x
  2. Step 2: Convert to fraction form
    142,838.10/197,050.32 = 100,421.64/x
  3. Step 3: Cross multiply
    142,838.10x = 197,050.32 × 100,421.64
  4. Step 4: Simplify right side
    142,838.10x = 19,788,116,296.92
  5. Step 5: Solve for x
    x = 19,788,116,296.92/142,838.10
  6. Step 6: Final answer
    x = 138,535.28

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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.