Home / 78,749,935.80-118,124,903.70-70,459,456.20

Finding the Fourth Proportional to 78,749,935.80, 118,124,903.70 and 70,459,456.20

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Solution

The fourth proportional to 78,749,935.80, 118,124,903.70 and 70,459,456.20 is: 105,689,184.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,749,935.80 : 118,124,903.70 = 70,459,456.20 : x
  2. Step 2: Convert to fraction form
    78,749,935.80/118,124,903.70 = 70,459,456.20/x
  3. Step 3: Cross multiply
    78,749,935.80x = 118,124,903.70 × 70,459,456.20
  4. Step 4: Simplify right side
    78,749,935.80x = 8,323,016,478,379,369
  5. Step 5: Solve for x
    x = 8,323,016,478,379,369/78,749,935.80
  6. Step 6: Final answer
    x = 105,689,184.30

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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.