Home / 78,723,810.40-118,085,715.60-21,215,970.40

Finding the Fourth Proportional to 78,723,810.40, 118,085,715.60 and 21,215,970.40

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Solution

The fourth proportional to 78,723,810.40, 118,085,715.60 and 21,215,970.40 is: 31,823,955.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,723,810.40 : 118,085,715.60 = 21,215,970.40 : x
  2. Step 2: Convert to fraction form
    78,723,810.40/118,085,715.60 = 21,215,970.40/x
  3. Step 3: Cross multiply
    78,723,810.40x = 118,085,715.60 × 21,215,970.40
  4. Step 4: Simplify right side
    78,723,810.40x = 2,505,303,046,832,418
  5. Step 5: Solve for x
    x = 2,505,303,046,832,418/78,723,810.40
  6. Step 6: Final answer
    x = 31,823,955.60

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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.