Home / 78,168,897.20-117,253,345.80-65,627,764.40

Finding the Fourth Proportional to 78,168,897.20, 117,253,345.80 and 65,627,764.40

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Solution

The fourth proportional to 78,168,897.20, 117,253,345.80 and 65,627,764.40 is: 98,441,646.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,168,897.20 : 117,253,345.80 = 65,627,764.40 : x
  2. Step 2: Convert to fraction form
    78,168,897.20/117,253,345.80 = 65,627,764.40/x
  3. Step 3: Cross multiply
    78,168,897.20x = 117,253,345.80 × 65,627,764.40
  4. Step 4: Simplify right side
    78,168,897.20x = 7,695,074,953,274,129
  5. Step 5: Solve for x
    x = 7,695,074,953,274,129/78,168,897.20
  6. Step 6: Final answer
    x = 98,441,646.60

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1.5x scale

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.