Home / 137,670,308.16-189,996,130.08-78,938,437.56

Finding the Fourth Proportional to 137,670,308.16, 189,996,130.08 and 78,938,437.56

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Solution

The fourth proportional to 137,670,308.16, 189,996,130.08 and 78,938,437.56 is: 108,941,411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,670,308.16 : 189,996,130.08 = 78,938,437.56 : x
  2. Step 2: Convert to fraction form
    137,670,308.16/189,996,130.08 = 78,938,437.56/x
  3. Step 3: Cross multiply
    137,670,308.16x = 189,996,130.08 × 78,938,437.56
  4. Step 4: Simplify right side
    137,670,308.16x = 14,997,997,650,961,720
  5. Step 5: Solve for x
    x = 14,997,997,650,961,720/137,670,308.16
  6. Step 6: Final answer
    x = 108,941,411.20

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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.