Home / 78,746,812.40-118,120,218.60-66,275,663.60

Finding the Fourth Proportional to 78,746,812.40, 118,120,218.60 and 66,275,663.60

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Solution

The fourth proportional to 78,746,812.40, 118,120,218.60 and 66,275,663.60 is: 99,413,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,746,812.40 : 118,120,218.60 = 66,275,663.60 : x
  2. Step 2: Convert to fraction form
    78,746,812.40/118,120,218.60 = 66,275,663.60/x
  3. Step 3: Cross multiply
    78,746,812.40x = 118,120,218.60 × 66,275,663.60
  4. Step 4: Simplify right side
    78,746,812.40x = 7,828,495,872,292,063
  5. Step 5: Solve for x
    x = 7,828,495,872,292,063/78,746,812.40
  6. Step 6: Final answer
    x = 99,413,495.40

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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.