Home / 85,066,483.20-127,316,289.60-78,264,038.40

Finding the Fourth Proportional to 85,066,483.20, 127,316,289.60 and 78,264,038.40

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Solution

The fourth proportional to 85,066,483.20, 127,316,289.60 and 78,264,038.40 is: 117,135,287.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,066,483.20 : 127,316,289.60 = 78,264,038.40 : x
  2. Step 2: Convert to fraction form
    85,066,483.20/127,316,289.60 = 78,264,038.40/x
  3. Step 3: Cross multiply
    85,066,483.20x = 127,316,289.60 × 78,264,038.40
  4. Step 4: Simplify right side
    85,066,483.20x = 9,964,286,978,199,920
  5. Step 5: Solve for x
    x = 9,964,286,978,199,920/85,066,483.20
  6. Step 6: Final answer
    x = 117,135,287.64

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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.