Home / 139,139,603.20-208,709,404.80-87,407,430.40

Finding the Fourth Proportional to 139,139,603.20, 208,709,404.80 and 87,407,430.40

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Solution

The fourth proportional to 139,139,603.20, 208,709,404.80 and 87,407,430.40 is: 131,111,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,139,603.20 : 208,709,404.80 = 87,407,430.40 : x
  2. Step 2: Convert to fraction form
    139,139,603.20/208,709,404.80 = 87,407,430.40/x
  3. Step 3: Cross multiply
    139,139,603.20x = 208,709,404.80 × 87,407,430.40
  4. Step 4: Simplify right side
    139,139,603.20x = 18,242,752,773,881,428
  5. Step 5: Solve for x
    x = 18,242,752,773,881,428/139,139,603.20
  6. Step 6: Final answer
    x = 131,111,145.60

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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.