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Finding the Fourth Proportional to 70,009,031.60, 105,013,547.40 and 60,435,220.40

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Solution

The fourth proportional to 70,009,031.60, 105,013,547.40 and 60,435,220.40 is: 90,652,830.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,009,031.60 : 105,013,547.40 = 60,435,220.40 : x
  2. Step 2: Convert to fraction form
    70,009,031.60/105,013,547.40 = 60,435,220.40/x
  3. Step 3: Cross multiply
    70,009,031.60x = 105,013,547.40 × 60,435,220.40
  4. Step 4: Simplify right side
    70,009,031.60x = 6,346,516,882,104,847
  5. Step 5: Solve for x
    x = 6,346,516,882,104,847/70,009,031.60
  6. Step 6: Final answer
    x = 90,652,830.60

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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.