Home / 78,858,916.40-118,111,427.40-64,703,140.40

Finding the Fourth Proportional to 78,858,916.40, 118,111,427.40 and 64,703,140.40

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Solution

The fourth proportional to 78,858,916.40, 118,111,427.40 and 64,703,140.40 is: 96,909,526.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,858,916.40 : 118,111,427.40 = 64,703,140.40 : x
  2. Step 2: Convert to fraction form
    78,858,916.40/118,111,427.40 = 64,703,140.40/x
  3. Step 3: Cross multiply
    78,858,916.40x = 118,111,427.40 × 64,703,140.40
  4. Step 4: Simplify right side
    78,858,916.40x = 7,642,180,269,906,607
  5. Step 5: Solve for x
    x = 7,642,180,269,906,607/78,858,916.40
  6. Step 6: Final answer
    x = 96,909,526.77

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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.