Home / 420,210,901.80-630,410,831.10-129,091,458.60

Finding the Fourth Proportional to 420,210,901.80, 630,410,831.10 and 129,091,458.60

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Solution

The fourth proportional to 420,210,901.80, 630,410,831.10 and 129,091,458.60 is: 193,666,212.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,210,901.80 : 630,410,831.10 = 129,091,458.60 : x
  2. Step 2: Convert to fraction form
    420,210,901.80/630,410,831.10 = 129,091,458.60/x
  3. Step 3: Cross multiply
    420,210,901.80x = 630,410,831.10 × 129,091,458.60
  4. Step 4: Simplify right side
    420,210,901.80x = 81,380,653,703,937,248
  5. Step 5: Solve for x
    x = 81,380,653,703,937,248/420,210,901.80
  6. Step 6: Final answer
    x = 193,666,212.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.