Home / 139,887,505.80-209,847,005.10-42,842,442.60

Finding the Fourth Proportional to 139,887,505.80, 209,847,005.10 and 42,842,442.60

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Solution

The fourth proportional to 139,887,505.80, 209,847,005.10 and 42,842,442.60 is: 64,268,486.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,887,505.80 : 209,847,005.10 = 42,842,442.60 : x
  2. Step 2: Convert to fraction form
    139,887,505.80/209,847,005.10 = 42,842,442.60/x
  3. Step 3: Cross multiply
    139,887,505.80x = 209,847,005.10 × 42,842,442.60
  4. Step 4: Simplify right side
    139,887,505.80x = 8,990,358,270,778,657
  5. Step 5: Solve for x
    x = 8,990,358,270,778,657/139,887,505.80
  6. Step 6: Final answer
    x = 64,268,486.45

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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.