Home / 98,656.08-147,985.20-78,909.36

Finding the Fourth Proportional to 98,656.08, 147,985.20 and 78,909.36

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Solution

The fourth proportional to 98,656.08, 147,985.20 and 78,909.36 is: 118,364.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,656.08 : 147,985.20 = 78,909.36 : x
  2. Step 2: Convert to fraction form
    98,656.08/147,985.20 = 78,909.36/x
  3. Step 3: Cross multiply
    98,656.08x = 147,985.20 × 78,909.36
  4. Step 4: Simplify right side
    98,656.08x = 11,677,417,421.47
  5. Step 5: Solve for x
    x = 11,677,417,421.47/98,656.08
  6. Step 6: Final answer
    x = 118,364.90

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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.