Home / 86,587,641.60-129,881,462.40-78,777,427.20

Finding the Fourth Proportional to 86,587,641.60, 129,881,462.40 and 78,777,427.20

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Solution

The fourth proportional to 86,587,641.60, 129,881,462.40 and 78,777,427.20 is: 118,166,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,587,641.60 : 129,881,462.40 = 78,777,427.20 : x
  2. Step 2: Convert to fraction form
    86,587,641.60/129,881,462.40 = 78,777,427.20/x
  3. Step 3: Cross multiply
    86,587,641.60x = 129,881,462.40 × 78,777,427.20
  4. Step 4: Simplify right side
    86,587,641.60x = 10,231,727,448,845,538
  5. Step 5: Solve for x
    x = 10,231,727,448,845,538/86,587,641.60
  6. Step 6: Final answer
    x = 118,166,140.80

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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.