Home / 77,985.70-117,030.45-42,455.98

Finding the Fourth Proportional to 77,985.70, 117,030.45 and 42,455.98

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Solution

The fourth proportional to 77,985.70, 117,030.45 and 42,455.98 is: 63,712.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,985.70 : 117,030.45 = 42,455.98 : x
  2. Step 2: Convert to fraction form
    77,985.70/117,030.45 = 42,455.98/x
  3. Step 3: Cross multiply
    77,985.70x = 117,030.45 × 42,455.98
  4. Step 4: Simplify right side
    77,985.70x = 4,968,642,444.59
  5. Step 5: Solve for x
    x = 4,968,642,444.59/77,985.70
  6. Step 6: Final answer
    x = 63,712.22

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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.